/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/add-sub07.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:52:40,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:52:40,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:52:40,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:52:40,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:52:40,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:52:40,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:52:40,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:52:40,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:52:40,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:52:40,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:52:40,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:52:40,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:52:40,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:52:40,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:52:40,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:52:40,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:52:40,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:52:40,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:52:40,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:52:40,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:52:40,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:52:40,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:52:40,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:52:40,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 18:52:40,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 18:52:40,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 18:52:40,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 18:52:40,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 18:52:40,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 18:52:40,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:52:40,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:52:40,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:52:40,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:52:40,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:52:40,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:52:40,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:52:40,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:52:40,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:52:40,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:52:40,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:52:40,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:52:40,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:52:40,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:52:40,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:52:40,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:52:40,210 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:52:40,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:52:40,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:52:40,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:52:40,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:52:40,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:52:40,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:52:40,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:52:40,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:52:40,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:52:40,213 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:52:40,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:52:40,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:52:40,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:52:40,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:52:40,478 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:52:40,479 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:52:40,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub07.bpl [2021-08-21 18:52:40,480 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub07.bpl' [2021-08-21 18:52:40,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:52:40,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:52:40,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:52:40,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:52:40,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:52:40,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:52:40,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:52:40,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:52:40,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:52:40,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:52:40,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:52:40,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:52:40,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:52:40,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/1) ... [2021-08-21 18:52:40,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:52:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:40,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:52:40,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:52:40,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:52:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:52:40,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:52:40,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 18:52:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 18:52:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 18:52:40,593 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:52:40,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:52:40,688 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 18:52:40,689 INFO L202 PluginConnector]: Adding new model add-sub07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:52:40 BoogieIcfgContainer [2021-08-21 18:52:40,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:52:40,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:52:40,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:52:40,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:52:40,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:40" (1/2) ... [2021-08-21 18:52:40,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4f2000 and model type add-sub07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:52:40, skipping insertion in model container [2021-08-21 18:52:40,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:52:40" (2/2) ... [2021-08-21 18:52:40,695 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub07.bpl [2021-08-21 18:52:40,698 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:52:40,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:52:40,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:52:40,698 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:52:40,727 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,727 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,727 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,727 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,728 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,729 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,730 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,730 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,730 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,730 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,730 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,731 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,732 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,732 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,732 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,732 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,732 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,733 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,734 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,734 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,734 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,734 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,737 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,750 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,752 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,755 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,757 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,759 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:40,772 INFO L148 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2021-08-21 18:52:40,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:52:40,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:52:40,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-21 18:52:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 27308 states, 18775 states have (on average 1.8421304926764315) internal successors, (34586), 27307 states have internal predecessors, (34586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:52:42,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:42,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:42,845 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1933818711, now seen corresponding path program 1 times [2021-08-21 18:52:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:42,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090743220] [2021-08-21 18:52:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:42,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:43,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090743220] [2021-08-21 18:52:43,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090743220] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:43,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:43,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 18:52:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041854023] [2021-08-21 18:52:43,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:52:43,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:52:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:52:43,093 INFO L87 Difference]: Start difference. First operand has 27308 states, 18775 states have (on average 1.8421304926764315) internal successors, (34586), 27307 states have internal predecessors, (34586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:43,247 INFO L93 Difference]: Finished difference Result 31680 states and 40593 transitions. [2021-08-21 18:52:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:52:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:52:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:43,274 INFO L225 Difference]: With dead ends: 31680 [2021-08-21 18:52:43,274 INFO L226 Difference]: Without dead ends: 4762 [2021-08-21 18:52:43,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:52:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-08-21 18:52:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4395. [2021-08-21 18:52:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4394 states have (on average 1.5068274920345925) internal successors, (6621), 4394 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 6621 transitions. [2021-08-21 18:52:43,399 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 6621 transitions. Word has length 23 [2021-08-21 18:52:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 6621 transitions. [2021-08-21 18:52:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 6621 transitions. [2021-08-21 18:52:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:43,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:43,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:43,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:52:43,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1333679461, now seen corresponding path program 1 times [2021-08-21 18:52:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:43,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105735921] [2021-08-21 18:52:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:43,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:43,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105735921] [2021-08-21 18:52:43,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105735921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:43,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:43,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:43,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708489365] [2021-08-21 18:52:43,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:43,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:43,483 INFO L87 Difference]: Start difference. First operand 4395 states and 6621 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:43,601 INFO L93 Difference]: Finished difference Result 4939 states and 7675 transitions. [2021-08-21 18:52:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:43,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:43,615 INFO L225 Difference]: With dead ends: 4939 [2021-08-21 18:52:43,615 INFO L226 Difference]: Without dead ends: 4931 [2021-08-21 18:52:43,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-08-21 18:52:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4408. [2021-08-21 18:52:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 1.514181983208532) internal successors, (6673), 4407 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 6673 transitions. [2021-08-21 18:52:43,710 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 6673 transitions. Word has length 26 [2021-08-21 18:52:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,710 INFO L470 AbstractCegarLoop]: Abstraction has 4408 states and 6673 transitions. [2021-08-21 18:52:43,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 6673 transitions. [2021-08-21 18:52:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:43,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:43,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:43,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:52:43,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash 625203475, now seen corresponding path program 1 times [2021-08-21 18:52:43,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:43,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223767810] [2021-08-21 18:52:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:43,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:43,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223767810] [2021-08-21 18:52:43,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223767810] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:43,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:43,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:43,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080837849] [2021-08-21 18:52:43,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:43,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:43,767 INFO L87 Difference]: Start difference. First operand 4408 states and 6673 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:43,814 INFO L93 Difference]: Finished difference Result 4983 states and 7732 transitions. [2021-08-21 18:52:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:43,828 INFO L225 Difference]: With dead ends: 4983 [2021-08-21 18:52:43,828 INFO L226 Difference]: Without dead ends: 4975 [2021-08-21 18:52:43,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-08-21 18:52:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4440. [2021-08-21 18:52:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4440 states, 4439 states have (on average 1.5293985131786438) internal successors, (6789), 4439 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4440 states to 4440 states and 6789 transitions. [2021-08-21 18:52:43,891 INFO L78 Accepts]: Start accepts. Automaton has 4440 states and 6789 transitions. Word has length 26 [2021-08-21 18:52:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,891 INFO L470 AbstractCegarLoop]: Abstraction has 4440 states and 6789 transitions. [2021-08-21 18:52:43,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4440 states and 6789 transitions. [2021-08-21 18:52:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:43,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:43,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:43,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:52:43,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1224254947, now seen corresponding path program 1 times [2021-08-21 18:52:43,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:43,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991934846] [2021-08-21 18:52:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:43,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:43,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991934846] [2021-08-21 18:52:43,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991934846] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:43,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:43,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:43,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092654981] [2021-08-21 18:52:43,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:43,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:43,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:43,987 INFO L87 Difference]: Start difference. First operand 4440 states and 6789 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,036 INFO L93 Difference]: Finished difference Result 5011 states and 7908 transitions. [2021-08-21 18:52:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,050 INFO L225 Difference]: With dead ends: 5011 [2021-08-21 18:52:44,050 INFO L226 Difference]: Without dead ends: 5003 [2021-08-21 18:52:44,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-08-21 18:52:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 4459. [2021-08-21 18:52:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 1.5437415881561238) internal successors, (6882), 4458 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 6882 transitions. [2021-08-21 18:52:44,129 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 6882 transitions. Word has length 26 [2021-08-21 18:52:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 6882 transitions. [2021-08-21 18:52:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 6882 transitions. [2021-08-21 18:52:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:44,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:52:44,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash 866128091, now seen corresponding path program 1 times [2021-08-21 18:52:44,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371078534] [2021-08-21 18:52:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:44,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371078534] [2021-08-21 18:52:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371078534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:44,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:44,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:44,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930183872] [2021-08-21 18:52:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:44,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,175 INFO L87 Difference]: Start difference. First operand 4459 states and 6882 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,217 INFO L93 Difference]: Finished difference Result 4983 states and 7788 transitions. [2021-08-21 18:52:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,230 INFO L225 Difference]: With dead ends: 4983 [2021-08-21 18:52:44,231 INFO L226 Difference]: Without dead ends: 4971 [2021-08-21 18:52:44,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2021-08-21 18:52:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4480. [2021-08-21 18:52:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 1.5487832105380666) internal successors, (6937), 4479 states have internal predecessors, (6937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6937 transitions. [2021-08-21 18:52:44,293 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6937 transitions. Word has length 26 [2021-08-21 18:52:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:44,293 INFO L470 AbstractCegarLoop]: Abstraction has 4480 states and 6937 transitions. [2021-08-21 18:52:44,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6937 transitions. [2021-08-21 18:52:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:44,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:52:44,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash 820194095, now seen corresponding path program 1 times [2021-08-21 18:52:44,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433867578] [2021-08-21 18:52:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:44,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433867578] [2021-08-21 18:52:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433867578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:44,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:44,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:44,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162363098] [2021-08-21 18:52:44,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:44,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,338 INFO L87 Difference]: Start difference. First operand 4480 states and 6937 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,385 INFO L93 Difference]: Finished difference Result 5072 states and 8073 transitions. [2021-08-21 18:52:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:44,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,396 INFO L225 Difference]: With dead ends: 5072 [2021-08-21 18:52:44,397 INFO L226 Difference]: Without dead ends: 5064 [2021-08-21 18:52:44,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-08-21 18:52:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4504. [2021-08-21 18:52:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4503 states have (on average 1.5614035087719298) internal successors, (7031), 4503 states have internal predecessors, (7031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 7031 transitions. [2021-08-21 18:52:44,520 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 7031 transitions. Word has length 26 [2021-08-21 18:52:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:44,520 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 7031 transitions. [2021-08-21 18:52:44,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 7031 transitions. [2021-08-21 18:52:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:44,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:52:44,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1210915947, now seen corresponding path program 1 times [2021-08-21 18:52:44,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130803235] [2021-08-21 18:52:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:44,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130803235] [2021-08-21 18:52:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130803235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:44,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:44,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:44,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338941551] [2021-08-21 18:52:44,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:44,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,576 INFO L87 Difference]: Start difference. First operand 4504 states and 7031 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,618 INFO L93 Difference]: Finished difference Result 5068 states and 8104 transitions. [2021-08-21 18:52:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:44,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,627 INFO L225 Difference]: With dead ends: 5068 [2021-08-21 18:52:44,627 INFO L226 Difference]: Without dead ends: 5060 [2021-08-21 18:52:44,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-08-21 18:52:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 4522. [2021-08-21 18:52:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 1.570891395708914) internal successors, (7102), 4521 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 7102 transitions. [2021-08-21 18:52:44,694 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 7102 transitions. Word has length 26 [2021-08-21 18:52:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:44,694 INFO L470 AbstractCegarLoop]: Abstraction has 4522 states and 7102 transitions. [2021-08-21 18:52:44,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 7102 transitions. [2021-08-21 18:52:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:44,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:52:44,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash -862147221, now seen corresponding path program 1 times [2021-08-21 18:52:44,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869890264] [2021-08-21 18:52:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:44,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869890264] [2021-08-21 18:52:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869890264] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:44,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:44,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:52:44,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090983681] [2021-08-21 18:52:44,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:52:44,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:52:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,744 INFO L87 Difference]: Start difference. First operand 4522 states and 7102 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,795 INFO L93 Difference]: Finished difference Result 5076 states and 8211 transitions. [2021-08-21 18:52:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:52:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,804 INFO L225 Difference]: With dead ends: 5076 [2021-08-21 18:52:44,804 INFO L226 Difference]: Without dead ends: 5068 [2021-08-21 18:52:44,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:52:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-08-21 18:52:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4541. [2021-08-21 18:52:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 4540 states have (on average 1.585022026431718) internal successors, (7196), 4540 states have internal predecessors, (7196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 7196 transitions. [2021-08-21 18:52:44,868 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 7196 transitions. Word has length 26 [2021-08-21 18:52:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:44,868 INFO L470 AbstractCegarLoop]: Abstraction has 4541 states and 7196 transitions. [2021-08-21 18:52:44,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 7196 transitions. [2021-08-21 18:52:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:44,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,874 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 18:52:44,875 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -575253023, now seen corresponding path program 1 times [2021-08-21 18:52:44,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598145046] [2021-08-21 18:52:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:44,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598145046] [2021-08-21 18:52:44,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598145046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:44,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:44,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:44,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516446234] [2021-08-21 18:52:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:44,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:44,924 INFO L87 Difference]: Start difference. First operand 4541 states and 7196 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:44,985 INFO L93 Difference]: Finished difference Result 5287 states and 8579 transitions. [2021-08-21 18:52:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:44,994 INFO L225 Difference]: With dead ends: 5287 [2021-08-21 18:52:44,994 INFO L226 Difference]: Without dead ends: 5279 [2021-08-21 18:52:44,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2021-08-21 18:52:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 4545. [2021-08-21 18:52:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 1.580105633802817) internal successors, (7180), 4544 states have internal predecessors, (7180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7180 transitions. [2021-08-21 18:52:45,060 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7180 transitions. Word has length 29 [2021-08-21 18:52:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,061 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 7180 transitions. [2021-08-21 18:52:45,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7180 transitions. [2021-08-21 18:52:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 18:52:45,066 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash 23798449, now seen corresponding path program 1 times [2021-08-21 18:52:45,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884964313] [2021-08-21 18:52:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884964313] [2021-08-21 18:52:45,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884964313] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:45,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:45,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:45,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240491090] [2021-08-21 18:52:45,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:45,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,113 INFO L87 Difference]: Start difference. First operand 4545 states and 7180 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,179 INFO L93 Difference]: Finished difference Result 5309 states and 8732 transitions. [2021-08-21 18:52:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,187 INFO L225 Difference]: With dead ends: 5309 [2021-08-21 18:52:45,187 INFO L226 Difference]: Without dead ends: 5301 [2021-08-21 18:52:45,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-08-21 18:52:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4578. [2021-08-21 18:52:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 1.6041074939916977) internal successors, (7342), 4577 states have internal predecessors, (7342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 7342 transitions. [2021-08-21 18:52:45,252 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 7342 transitions. Word has length 29 [2021-08-21 18:52:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,253 INFO L470 AbstractCegarLoop]: Abstraction has 4578 states and 7342 transitions. [2021-08-21 18:52:45,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 7342 transitions. [2021-08-21 18:52:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 18:52:45,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash -334328407, now seen corresponding path program 1 times [2021-08-21 18:52:45,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400368005] [2021-08-21 18:52:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400368005] [2021-08-21 18:52:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400368005] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:45,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:45,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905855451] [2021-08-21 18:52:45,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:45,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,304 INFO L87 Difference]: Start difference. First operand 4578 states and 7342 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,363 INFO L93 Difference]: Finished difference Result 5271 states and 8589 transitions. [2021-08-21 18:52:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,372 INFO L225 Difference]: With dead ends: 5271 [2021-08-21 18:52:45,373 INFO L226 Difference]: Without dead ends: 5259 [2021-08-21 18:52:45,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2021-08-21 18:52:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4588. [2021-08-21 18:52:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 1.6086766950076303) internal successors, (7379), 4587 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 7379 transitions. [2021-08-21 18:52:45,439 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 7379 transitions. Word has length 29 [2021-08-21 18:52:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 4588 states and 7379 transitions. [2021-08-21 18:52:45,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 7379 transitions. [2021-08-21 18:52:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:52:45,445 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash -380262403, now seen corresponding path program 1 times [2021-08-21 18:52:45,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461472890] [2021-08-21 18:52:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461472890] [2021-08-21 18:52:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461472890] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:45,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:45,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:45,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072777254] [2021-08-21 18:52:45,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:45,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,488 INFO L87 Difference]: Start difference. First operand 4588 states and 7379 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,550 INFO L93 Difference]: Finished difference Result 5355 states and 8868 transitions. [2021-08-21 18:52:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,559 INFO L225 Difference]: With dead ends: 5355 [2021-08-21 18:52:45,559 INFO L226 Difference]: Without dead ends: 5347 [2021-08-21 18:52:45,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2021-08-21 18:52:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 4612. [2021-08-21 18:52:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 1.6180871828236825) internal successors, (7461), 4611 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 7461 transitions. [2021-08-21 18:52:45,624 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 7461 transitions. Word has length 29 [2021-08-21 18:52:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,624 INFO L470 AbstractCegarLoop]: Abstraction has 4612 states and 7461 transitions. [2021-08-21 18:52:45,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 7461 transitions. [2021-08-21 18:52:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 18:52:45,630 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 10459449, now seen corresponding path program 1 times [2021-08-21 18:52:45,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482718830] [2021-08-21 18:52:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482718830] [2021-08-21 18:52:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482718830] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:45,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:45,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:45,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230851478] [2021-08-21 18:52:45,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:45,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,673 INFO L87 Difference]: Start difference. First operand 4612 states and 7461 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,733 INFO L93 Difference]: Finished difference Result 5341 states and 8862 transitions. [2021-08-21 18:52:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:45,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,742 INFO L225 Difference]: With dead ends: 5341 [2021-08-21 18:52:45,742 INFO L226 Difference]: Without dead ends: 5333 [2021-08-21 18:52:45,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-08-21 18:52:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 4620. [2021-08-21 18:52:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 4619 states have (on average 1.6213466118207405) internal successors, (7489), 4619 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 7489 transitions. [2021-08-21 18:52:45,806 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 7489 transitions. Word has length 29 [2021-08-21 18:52:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,806 INFO L470 AbstractCegarLoop]: Abstraction has 4620 states and 7489 transitions. [2021-08-21 18:52:45,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 7489 transitions. [2021-08-21 18:52:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 18:52:45,812 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2062603719, now seen corresponding path program 1 times [2021-08-21 18:52:45,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994031738] [2021-08-21 18:52:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994031738] [2021-08-21 18:52:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994031738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:45,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078424760] [2021-08-21 18:52:45,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:45,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,856 INFO L87 Difference]: Start difference. First operand 4620 states and 7489 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,924 INFO L93 Difference]: Finished difference Result 5348 states and 8936 transitions. [2021-08-21 18:52:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,931 INFO L225 Difference]: With dead ends: 5348 [2021-08-21 18:52:45,932 INFO L226 Difference]: Without dead ends: 5340 [2021-08-21 18:52:45,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-08-21 18:52:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 4639. [2021-08-21 18:52:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 1.6278568348426046) internal successors, (7550), 4638 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 7550 transitions. [2021-08-21 18:52:45,994 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 7550 transitions. Word has length 29 [2021-08-21 18:52:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,994 INFO L470 AbstractCegarLoop]: Abstraction has 4639 states and 7550 transitions. [2021-08-21 18:52:45,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 7550 transitions. [2021-08-21 18:52:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:46,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:46,000 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:46,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 18:52:46,000 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 857970153, now seen corresponding path program 2 times [2021-08-21 18:52:46,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:46,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927820869] [2021-08-21 18:52:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:46,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:46,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:46,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927820869] [2021-08-21 18:52:46,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927820869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704941732] [2021-08-21 18:52:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:46,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:46,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:46,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:46,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:52:46,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:46,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:46,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704941732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:46,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:46,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720297235] [2021-08-21 18:52:46,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:46,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:46,309 INFO L87 Difference]: Start difference. First operand 4639 states and 7550 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:46,380 INFO L93 Difference]: Finished difference Result 5317 states and 8924 transitions. [2021-08-21 18:52:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:46,388 INFO L225 Difference]: With dead ends: 5317 [2021-08-21 18:52:46,389 INFO L226 Difference]: Without dead ends: 5309 [2021-08-21 18:52:46,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-08-21 18:52:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 4664. [2021-08-21 18:52:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 1.6446493673600686) internal successors, (7669), 4663 states have internal predecessors, (7669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 7669 transitions. [2021-08-21 18:52:46,442 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 7669 transitions. Word has length 29 [2021-08-21 18:52:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:46,442 INFO L470 AbstractCegarLoop]: Abstraction has 4664 states and 7669 transitions. [2021-08-21 18:52:46,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 7669 transitions. [2021-08-21 18:52:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:46,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:46,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:46,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:46,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:52:46,664 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:46,664 INFO L82 PathProgramCache]: Analyzing trace with hash 505786341, now seen corresponding path program 2 times [2021-08-21 18:52:46,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:46,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635627750] [2021-08-21 18:52:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:46,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:46,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:46,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635627750] [2021-08-21 18:52:46,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635627750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489597147] [2021-08-21 18:52:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:46,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:46,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:46,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:52:46,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489597147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306313952] [2021-08-21 18:52:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:46,973 INFO L87 Difference]: Start difference. First operand 4664 states and 7669 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:47,050 INFO L93 Difference]: Finished difference Result 5357 states and 9072 transitions. [2021-08-21 18:52:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:47,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:47,059 INFO L225 Difference]: With dead ends: 5357 [2021-08-21 18:52:47,059 INFO L226 Difference]: Without dead ends: 5349 [2021-08-21 18:52:47,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-08-21 18:52:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4694. [2021-08-21 18:52:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4693 states have (on average 1.6594928617089282) internal successors, (7788), 4693 states have internal predecessors, (7788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 7788 transitions. [2021-08-21 18:52:47,111 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 7788 transitions. Word has length 29 [2021-08-21 18:52:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:47,111 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 7788 transitions. [2021-08-21 18:52:47,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 7788 transitions. [2021-08-21 18:52:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:47,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:47,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:47,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:47,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:52:47,329 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1365492341, now seen corresponding path program 2 times [2021-08-21 18:52:47,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:47,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719428216] [2021-08-21 18:52:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:47,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:47,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:47,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719428216] [2021-08-21 18:52:47,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719428216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:47,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107691903] [2021-08-21 18:52:47,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:47,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:47,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:47,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:47,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:52:47,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:47,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107691903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:47,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:47,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:47,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810708585] [2021-08-21 18:52:47,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:47,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:47,651 INFO L87 Difference]: Start difference. First operand 4694 states and 7788 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:47,707 INFO L93 Difference]: Finished difference Result 5366 states and 9118 transitions. [2021-08-21 18:52:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:47,715 INFO L225 Difference]: With dead ends: 5366 [2021-08-21 18:52:47,715 INFO L226 Difference]: Without dead ends: 5358 [2021-08-21 18:52:47,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5358 states. [2021-08-21 18:52:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5358 to 4714. [2021-08-21 18:52:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 1.6698493528538085) internal successors, (7870), 4713 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 7870 transitions. [2021-08-21 18:52:47,765 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 7870 transitions. Word has length 29 [2021-08-21 18:52:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:47,765 INFO L470 AbstractCegarLoop]: Abstraction has 4714 states and 7870 transitions. [2021-08-21 18:52:47,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 7870 transitions. [2021-08-21 18:52:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:47,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:47,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:47,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:47,984 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1384694073, now seen corresponding path program 1 times [2021-08-21 18:52:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:47,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515890074] [2021-08-21 18:52:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:47,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:48,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515890074] [2021-08-21 18:52:48,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515890074] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:48,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:48,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:48,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567826883] [2021-08-21 18:52:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:48,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,027 INFO L87 Difference]: Start difference. First operand 4714 states and 7870 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,079 INFO L93 Difference]: Finished difference Result 5562 states and 9614 transitions. [2021-08-21 18:52:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,087 INFO L225 Difference]: With dead ends: 5562 [2021-08-21 18:52:48,087 INFO L226 Difference]: Without dead ends: 5554 [2021-08-21 18:52:48,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-08-21 18:52:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 4785. [2021-08-21 18:52:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4784 states have (on average 1.7012959866220736) internal successors, (8139), 4784 states have internal predecessors, (8139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 8139 transitions. [2021-08-21 18:52:48,148 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 8139 transitions. Word has length 29 [2021-08-21 18:52:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,149 INFO L470 AbstractCegarLoop]: Abstraction has 4785 states and 8139 transitions. [2021-08-21 18:52:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 8139 transitions. [2021-08-21 18:52:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 18:52:48,155 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1026567217, now seen corresponding path program 1 times [2021-08-21 18:52:48,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295185227] [2021-08-21 18:52:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:48,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295185227] [2021-08-21 18:52:48,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295185227] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:48,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:48,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:48,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425706986] [2021-08-21 18:52:48,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:48,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,195 INFO L87 Difference]: Start difference. First operand 4785 states and 8139 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,241 INFO L93 Difference]: Finished difference Result 5556 states and 9526 transitions. [2021-08-21 18:52:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,247 INFO L225 Difference]: With dead ends: 5556 [2021-08-21 18:52:48,247 INFO L226 Difference]: Without dead ends: 5544 [2021-08-21 18:52:48,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-08-21 18:52:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 4838. [2021-08-21 18:52:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 1.7070498242712424) internal successors, (8257), 4837 states have internal predecessors, (8257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 8257 transitions. [2021-08-21 18:52:48,294 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 8257 transitions. Word has length 29 [2021-08-21 18:52:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 4838 states and 8257 transitions. [2021-08-21 18:52:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 8257 transitions. [2021-08-21 18:52:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 18:52:48,299 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 980633221, now seen corresponding path program 1 times [2021-08-21 18:52:48,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874297085] [2021-08-21 18:52:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:48,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874297085] [2021-08-21 18:52:48,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874297085] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:48,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:48,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:48,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617697023] [2021-08-21 18:52:48,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:48,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,337 INFO L87 Difference]: Start difference. First operand 4838 states and 8257 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,391 INFO L93 Difference]: Finished difference Result 5698 states and 9940 transitions. [2021-08-21 18:52:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,399 INFO L225 Difference]: With dead ends: 5698 [2021-08-21 18:52:48,399 INFO L226 Difference]: Without dead ends: 5690 [2021-08-21 18:52:48,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-08-21 18:52:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4901. [2021-08-21 18:52:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 1.7253061224489796) internal successors, (8454), 4900 states have internal predecessors, (8454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 8454 transitions. [2021-08-21 18:52:48,456 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 8454 transitions. Word has length 29 [2021-08-21 18:52:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 4901 states and 8454 transitions. [2021-08-21 18:52:48,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 8454 transitions. [2021-08-21 18:52:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 18:52:48,461 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1371355073, now seen corresponding path program 1 times [2021-08-21 18:52:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815009744] [2021-08-21 18:52:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:48,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815009744] [2021-08-21 18:52:48,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815009744] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:48,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:48,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:48,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612810979] [2021-08-21 18:52:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:48,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,500 INFO L87 Difference]: Start difference. First operand 4901 states and 8454 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,551 INFO L93 Difference]: Finished difference Result 5725 states and 10037 transitions. [2021-08-21 18:52:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,558 INFO L225 Difference]: With dead ends: 5725 [2021-08-21 18:52:48,558 INFO L226 Difference]: Without dead ends: 5717 [2021-08-21 18:52:48,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2021-08-21 18:52:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 4952. [2021-08-21 18:52:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4952 states, 4951 states have (on average 1.7370228236719853) internal successors, (8600), 4951 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4952 states to 4952 states and 8600 transitions. [2021-08-21 18:52:48,610 INFO L78 Accepts]: Start accepts. Automaton has 4952 states and 8600 transitions. Word has length 29 [2021-08-21 18:52:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,610 INFO L470 AbstractCegarLoop]: Abstraction has 4952 states and 8600 transitions. [2021-08-21 18:52:48,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4952 states and 8600 transitions. [2021-08-21 18:52:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,615 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 18:52:48,615 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash -701708095, now seen corresponding path program 1 times [2021-08-21 18:52:48,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277318933] [2021-08-21 18:52:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:48,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277318933] [2021-08-21 18:52:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277318933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:48,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:48,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:48,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724409917] [2021-08-21 18:52:48,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:48,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,653 INFO L87 Difference]: Start difference. First operand 4952 states and 8600 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,711 INFO L93 Difference]: Finished difference Result 5778 states and 10238 transitions. [2021-08-21 18:52:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,720 INFO L225 Difference]: With dead ends: 5778 [2021-08-21 18:52:48,720 INFO L226 Difference]: Without dead ends: 5770 [2021-08-21 18:52:48,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-08-21 18:52:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4995. [2021-08-21 18:52:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 1.7577092511013215) internal successors, (8778), 4994 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 8778 transitions. [2021-08-21 18:52:48,770 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 8778 transitions. Word has length 29 [2021-08-21 18:52:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,770 INFO L470 AbstractCegarLoop]: Abstraction has 4995 states and 8778 transitions. [2021-08-21 18:52:48,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 8778 transitions. [2021-08-21 18:52:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 18:52:48,776 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1748942433, now seen corresponding path program 2 times [2021-08-21 18:52:48,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574990604] [2021-08-21 18:52:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:48,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574990604] [2021-08-21 18:52:48,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574990604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:48,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123148232] [2021-08-21 18:52:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:48,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:48,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:48,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:52:48,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:48,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:49,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123148232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:49,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:49,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:49,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277380845] [2021-08-21 18:52:49,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:49,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:49,078 INFO L87 Difference]: Start difference. First operand 4995 states and 8778 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:49,156 INFO L93 Difference]: Finished difference Result 5718 states and 10248 transitions. [2021-08-21 18:52:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:49,162 INFO L225 Difference]: With dead ends: 5718 [2021-08-21 18:52:49,162 INFO L226 Difference]: Without dead ends: 5710 [2021-08-21 18:52:49,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2021-08-21 18:52:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 5010. [2021-08-21 18:52:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5009 states have (on average 1.7668197244959074) internal successors, (8850), 5009 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 8850 transitions. [2021-08-21 18:52:49,213 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 8850 transitions. Word has length 29 [2021-08-21 18:52:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:49,213 INFO L470 AbstractCegarLoop]: Abstraction has 5010 states and 8850 transitions. [2021-08-21 18:52:49,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 8850 transitions. [2021-08-21 18:52:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:49,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:49,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:49,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:49,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:49,434 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -556179487, now seen corresponding path program 2 times [2021-08-21 18:52:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:49,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229918543] [2021-08-21 18:52:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:49,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:49,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:49,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229918543] [2021-08-21 18:52:49,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229918543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:49,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762901444] [2021-08-21 18:52:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:49,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:49,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:49,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:52:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:49,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762901444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:49,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:49,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:49,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201899611] [2021-08-21 18:52:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:49,798 INFO L87 Difference]: Start difference. First operand 5010 states and 8850 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:49,868 INFO L93 Difference]: Finished difference Result 5751 states and 10318 transitions. [2021-08-21 18:52:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:49,875 INFO L225 Difference]: With dead ends: 5751 [2021-08-21 18:52:49,875 INFO L226 Difference]: Without dead ends: 5743 [2021-08-21 18:52:49,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5743 states. [2021-08-21 18:52:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5743 to 5039. [2021-08-21 18:52:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5038 states have (on average 1.779674473997618) internal successors, (8966), 5038 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 8966 transitions. [2021-08-21 18:52:49,925 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 8966 transitions. Word has length 29 [2021-08-21 18:52:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 5039 states and 8966 transitions. [2021-08-21 18:52:49,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 8966 transitions. [2021-08-21 18:52:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:49,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:49,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:49,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:52:50,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1779854689, now seen corresponding path program 1 times [2021-08-21 18:52:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:50,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151678583] [2021-08-21 18:52:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:50,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:50,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:50,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151678583] [2021-08-21 18:52:50,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151678583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:50,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:50,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:50,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204020537] [2021-08-21 18:52:50,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:50,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,186 INFO L87 Difference]: Start difference. First operand 5039 states and 8966 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:50,238 INFO L93 Difference]: Finished difference Result 5830 states and 10430 transitions. [2021-08-21 18:52:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:50,246 INFO L225 Difference]: With dead ends: 5830 [2021-08-21 18:52:50,246 INFO L226 Difference]: Without dead ends: 5818 [2021-08-21 18:52:50,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-08-21 18:52:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 5065. [2021-08-21 18:52:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5065 states, 5064 states have (on average 1.7863349131121642) internal successors, (9046), 5064 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5065 states to 5065 states and 9046 transitions. [2021-08-21 18:52:50,303 INFO L78 Accepts]: Start accepts. Automaton has 5065 states and 9046 transitions. Word has length 29 [2021-08-21 18:52:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:50,303 INFO L470 AbstractCegarLoop]: Abstraction has 5065 states and 9046 transitions. [2021-08-21 18:52:50,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5065 states and 9046 transitions. [2021-08-21 18:52:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:50,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:50,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:50,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-21 18:52:50,309 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1733920693, now seen corresponding path program 1 times [2021-08-21 18:52:50,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:50,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705341807] [2021-08-21 18:52:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:50,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:50,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:50,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705341807] [2021-08-21 18:52:50,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705341807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:50,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:50,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:50,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303779812] [2021-08-21 18:52:50,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:50,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,346 INFO L87 Difference]: Start difference. First operand 5065 states and 9046 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:50,416 INFO L93 Difference]: Finished difference Result 5938 states and 10789 transitions. [2021-08-21 18:52:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:50,423 INFO L225 Difference]: With dead ends: 5938 [2021-08-21 18:52:50,423 INFO L226 Difference]: Without dead ends: 5930 [2021-08-21 18:52:50,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2021-08-21 18:52:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5110. [2021-08-21 18:52:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5110 states, 5109 states have (on average 1.8044627128596595) internal successors, (9219), 5109 states have internal predecessors, (9219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5110 states to 5110 states and 9219 transitions. [2021-08-21 18:52:50,479 INFO L78 Accepts]: Start accepts. Automaton has 5110 states and 9219 transitions. Word has length 29 [2021-08-21 18:52:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 5110 states and 9219 transitions. [2021-08-21 18:52:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5110 states and 9219 transitions. [2021-08-21 18:52:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:50,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:50,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:50,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-21 18:52:50,485 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2124642545, now seen corresponding path program 1 times [2021-08-21 18:52:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:50,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386008406] [2021-08-21 18:52:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:50,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:50,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:50,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386008406] [2021-08-21 18:52:50,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386008406] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:50,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:50,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:50,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352757185] [2021-08-21 18:52:50,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:50,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,527 INFO L87 Difference]: Start difference. First operand 5110 states and 9219 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:50,588 INFO L93 Difference]: Finished difference Result 5951 states and 10893 transitions. [2021-08-21 18:52:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:50,595 INFO L225 Difference]: With dead ends: 5951 [2021-08-21 18:52:50,595 INFO L226 Difference]: Without dead ends: 5943 [2021-08-21 18:52:50,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2021-08-21 18:52:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 5139. [2021-08-21 18:52:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5139 states, 5138 states have (on average 1.8162709225379525) internal successors, (9332), 5138 states have internal predecessors, (9332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 9332 transitions. [2021-08-21 18:52:50,653 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 9332 transitions. Word has length 29 [2021-08-21 18:52:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:50,653 INFO L470 AbstractCegarLoop]: Abstraction has 5139 states and 9332 transitions. [2021-08-21 18:52:50,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 9332 transitions. [2021-08-21 18:52:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:50,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:50,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:50,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-21 18:52:50,660 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash 51579377, now seen corresponding path program 1 times [2021-08-21 18:52:50,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:50,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415348522] [2021-08-21 18:52:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:50,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:50,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:50,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415348522] [2021-08-21 18:52:50,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415348522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:50,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:50,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:50,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275560440] [2021-08-21 18:52:50,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:50,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:50,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,701 INFO L87 Difference]: Start difference. First operand 5139 states and 9332 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:50,782 INFO L93 Difference]: Finished difference Result 5975 states and 11039 transitions. [2021-08-21 18:52:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:50,789 INFO L225 Difference]: With dead ends: 5975 [2021-08-21 18:52:50,790 INFO L226 Difference]: Without dead ends: 5967 [2021-08-21 18:52:50,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2021-08-21 18:52:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 5171. [2021-08-21 18:52:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 1.8338491295938104) internal successors, (9481), 5170 states have internal predecessors, (9481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 9481 transitions. [2021-08-21 18:52:50,847 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 9481 transitions. Word has length 29 [2021-08-21 18:52:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:50,847 INFO L470 AbstractCegarLoop]: Abstraction has 5171 states and 9481 transitions. [2021-08-21 18:52:50,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 9481 transitions. [2021-08-21 18:52:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:50,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:50,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:50,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 18:52:50,854 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash 266898921, now seen corresponding path program 2 times [2021-08-21 18:52:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:50,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506649706] [2021-08-21 18:52:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:50,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:50,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:50,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506649706] [2021-08-21 18:52:50,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506649706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:50,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486173458] [2021-08-21 18:52:50,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:50,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:50,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:50,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:52:51,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486173458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:51,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:51,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:51,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333751184] [2021-08-21 18:52:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:51,224 INFO L87 Difference]: Start difference. First operand 5171 states and 9481 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:51,285 INFO L93 Difference]: Finished difference Result 5966 states and 11117 transitions. [2021-08-21 18:52:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:51,292 INFO L225 Difference]: With dead ends: 5966 [2021-08-21 18:52:51,292 INFO L226 Difference]: Without dead ends: 5958 [2021-08-21 18:52:51,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2021-08-21 18:52:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5201. [2021-08-21 18:52:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5201 states, 5200 states have (on average 1.846923076923077) internal successors, (9604), 5200 states have internal predecessors, (9604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 9604 transitions. [2021-08-21 18:52:51,346 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 9604 transitions. Word has length 29 [2021-08-21 18:52:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:51,346 INFO L470 AbstractCegarLoop]: Abstraction has 5201 states and 9604 transitions. [2021-08-21 18:52:51,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 9604 transitions. [2021-08-21 18:52:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:51,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:51,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:51,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:52:51,591 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash -144640283, now seen corresponding path program 2 times [2021-08-21 18:52:51,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:51,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233509184] [2021-08-21 18:52:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:51,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:51,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:51,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233509184] [2021-08-21 18:52:51,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233509184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:51,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269644575] [2021-08-21 18:52:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:51,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:51,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:51,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:52:51,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:51,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269644575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:51,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:51,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:51,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448487751] [2021-08-21 18:52:51,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:51,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:51,994 INFO L87 Difference]: Start difference. First operand 5201 states and 9604 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:52,057 INFO L93 Difference]: Finished difference Result 5963 states and 11162 transitions. [2021-08-21 18:52:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:52,080 INFO L225 Difference]: With dead ends: 5963 [2021-08-21 18:52:52,080 INFO L226 Difference]: Without dead ends: 5955 [2021-08-21 18:52:52,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2021-08-21 18:52:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 5221. [2021-08-21 18:52:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 5220 states have (on average 1.856704980842912) internal successors, (9692), 5220 states have internal predecessors, (9692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 9692 transitions. [2021-08-21 18:52:52,134 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 9692 transitions. Word has length 29 [2021-08-21 18:52:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:52,134 INFO L470 AbstractCegarLoop]: Abstraction has 5221 states and 9692 transitions. [2021-08-21 18:52:52,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 9692 transitions. [2021-08-21 18:52:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:52,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:52,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:52,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:52,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:52,357 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1281193383, now seen corresponding path program 2 times [2021-08-21 18:52:52,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:52,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491237852] [2021-08-21 18:52:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:52,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:52,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:52,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491237852] [2021-08-21 18:52:52,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491237852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:52,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227295099] [2021-08-21 18:52:52,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:52,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:52,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:52,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:52,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:52:52,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:52,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:52,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:52,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:52,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227295099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:52,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:52,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:52,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988409949] [2021-08-21 18:52:52,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:52,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:52,744 INFO L87 Difference]: Start difference. First operand 5221 states and 9692 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:52,799 INFO L93 Difference]: Finished difference Result 5932 states and 11098 transitions. [2021-08-21 18:52:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:52,806 INFO L225 Difference]: With dead ends: 5932 [2021-08-21 18:52:52,806 INFO L226 Difference]: Without dead ends: 5924 [2021-08-21 18:52:52,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2021-08-21 18:52:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 5231. [2021-08-21 18:52:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 1.8613766730401529) internal successors, (9735), 5230 states have internal predecessors, (9735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 9735 transitions. [2021-08-21 18:52:52,860 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 9735 transitions. Word has length 29 [2021-08-21 18:52:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:52,860 INFO L470 AbstractCegarLoop]: Abstraction has 5231 states and 9735 transitions. [2021-08-21 18:52:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 9735 transitions. [2021-08-21 18:52:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:52,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:52,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:52,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:53,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 18:52:53,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1508069271, now seen corresponding path program 2 times [2021-08-21 18:52:53,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:53,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496437720] [2021-08-21 18:52:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:53,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:53,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:53,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496437720] [2021-08-21 18:52:53,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496437720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644345269] [2021-08-21 18:52:53,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:53,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:53,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:53,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:53,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:52:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644345269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:53,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:53,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672379986] [2021-08-21 18:52:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:53,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:53,564 INFO L87 Difference]: Start difference. First operand 5231 states and 9735 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:53,614 INFO L93 Difference]: Finished difference Result 5961 states and 11091 transitions. [2021-08-21 18:52:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:53,622 INFO L225 Difference]: With dead ends: 5961 [2021-08-21 18:52:53,622 INFO L226 Difference]: Without dead ends: 5953 [2021-08-21 18:52:53,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-08-21 18:52:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 5264. [2021-08-21 18:52:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.8639559186775603) internal successors, (9810), 5263 states have internal predecessors, (9810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 9810 transitions. [2021-08-21 18:52:53,685 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 9810 transitions. Word has length 29 [2021-08-21 18:52:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:53,685 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 9810 transitions. [2021-08-21 18:52:53,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 9810 transitions. [2021-08-21 18:52:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:53,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:53,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:53,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:53,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:53,906 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1141912437, now seen corresponding path program 2 times [2021-08-21 18:52:53,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:53,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739239479] [2021-08-21 18:52:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:53,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:53,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:53,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739239479] [2021-08-21 18:52:53,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739239479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640596196] [2021-08-21 18:52:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:53,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:53,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:54,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:52:54,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:54,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640596196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:54,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:54,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608845683] [2021-08-21 18:52:54,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:54,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:54,404 INFO L87 Difference]: Start difference. First operand 5264 states and 9810 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:54,460 INFO L93 Difference]: Finished difference Result 5996 states and 11253 transitions. [2021-08-21 18:52:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:54,468 INFO L225 Difference]: With dead ends: 5996 [2021-08-21 18:52:54,468 INFO L226 Difference]: Without dead ends: 5988 [2021-08-21 18:52:54,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2021-08-21 18:52:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5279. [2021-08-21 18:52:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5279 states, 5278 states have (on average 1.8694581280788178) internal successors, (9867), 5278 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5279 states to 5279 states and 9867 transitions. [2021-08-21 18:52:54,523 INFO L78 Accepts]: Start accepts. Automaton has 5279 states and 9867 transitions. Word has length 29 [2021-08-21 18:52:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 5279 states and 9867 transitions. [2021-08-21 18:52:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5279 states and 9867 transitions. [2021-08-21 18:52:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:54,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:54,530 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:54,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:54,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:52:54,749 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1475516861, now seen corresponding path program 1 times [2021-08-21 18:52:54,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:54,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487070700] [2021-08-21 18:52:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:54,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:54,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487070700] [2021-08-21 18:52:54,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487070700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:54,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:54,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:54,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340497508] [2021-08-21 18:52:54,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:54,803 INFO L87 Difference]: Start difference. First operand 5279 states and 9867 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:54,857 INFO L93 Difference]: Finished difference Result 6106 states and 11428 transitions. [2021-08-21 18:52:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:54,865 INFO L225 Difference]: With dead ends: 6106 [2021-08-21 18:52:54,865 INFO L226 Difference]: Without dead ends: 6094 [2021-08-21 18:52:54,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6094 states. [2021-08-21 18:52:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6094 to 5315. [2021-08-21 18:52:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5314 states have (on average 1.87617613850207) internal successors, (9970), 5314 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 9970 transitions. [2021-08-21 18:52:54,926 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 9970 transitions. Word has length 29 [2021-08-21 18:52:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:54,926 INFO L470 AbstractCegarLoop]: Abstraction has 5315 states and 9970 transitions. [2021-08-21 18:52:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 9970 transitions. [2021-08-21 18:52:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:54,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:54,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-21 18:52:54,934 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1866238713, now seen corresponding path program 1 times [2021-08-21 18:52:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:54,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659637908] [2021-08-21 18:52:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:54,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:54,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659637908] [2021-08-21 18:52:54,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659637908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:54,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:54,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:54,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650616072] [2021-08-21 18:52:54,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:54,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:54,972 INFO L87 Difference]: Start difference. First operand 5315 states and 9970 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:55,025 INFO L93 Difference]: Finished difference Result 6114 states and 11455 transitions. [2021-08-21 18:52:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:55,032 INFO L225 Difference]: With dead ends: 6114 [2021-08-21 18:52:55,033 INFO L226 Difference]: Without dead ends: 6102 [2021-08-21 18:52:55,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2021-08-21 18:52:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 5360. [2021-08-21 18:52:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 1.8811345400261243) internal successors, (10081), 5359 states have internal predecessors, (10081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 10081 transitions. [2021-08-21 18:52:55,083 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 10081 transitions. Word has length 29 [2021-08-21 18:52:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:55,083 INFO L470 AbstractCegarLoop]: Abstraction has 5360 states and 10081 transitions. [2021-08-21 18:52:55,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 10081 transitions. [2021-08-21 18:52:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:55,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:55,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:55,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-21 18:52:55,089 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1761672859, now seen corresponding path program 2 times [2021-08-21 18:52:55,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:55,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092907639] [2021-08-21 18:52:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:55,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:55,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092907639] [2021-08-21 18:52:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092907639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309763064] [2021-08-21 18:52:55,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:55,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:55,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:55,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:52:55,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:55,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:55,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:55,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309763064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:55,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:55,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:55,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456879939] [2021-08-21 18:52:55,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:55,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:55,532 INFO L87 Difference]: Start difference. First operand 5360 states and 10081 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:55,589 INFO L93 Difference]: Finished difference Result 6149 states and 11618 transitions. [2021-08-21 18:52:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:55,596 INFO L225 Difference]: With dead ends: 6149 [2021-08-21 18:52:55,596 INFO L226 Difference]: Without dead ends: 6141 [2021-08-21 18:52:55,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2021-08-21 18:52:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 5390. [2021-08-21 18:52:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5390 states, 5389 states have (on average 1.8894043421785118) internal successors, (10182), 5389 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 10182 transitions. [2021-08-21 18:52:55,648 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 10182 transitions. Word has length 29 [2021-08-21 18:52:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:55,648 INFO L470 AbstractCegarLoop]: Abstraction has 5390 states and 10182 transitions. [2021-08-21 18:52:55,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 10182 transitions. [2021-08-21 18:52:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:55,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:55,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:55,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:55,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:52:55,870 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 204163169, now seen corresponding path program 2 times [2021-08-21 18:52:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:55,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664410147] [2021-08-21 18:52:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:55,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:55,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:55,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664410147] [2021-08-21 18:52:55,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664410147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:55,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284711672] [2021-08-21 18:52:55,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:55,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:55,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:55,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:55,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:52:56,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:56,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284711672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:56,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:56,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:56,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067594931] [2021-08-21 18:52:56,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:56,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:56,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:56,348 INFO L87 Difference]: Start difference. First operand 5390 states and 10182 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:56,406 INFO L93 Difference]: Finished difference Result 6137 states and 11610 transitions. [2021-08-21 18:52:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:56,414 INFO L225 Difference]: With dead ends: 6137 [2021-08-21 18:52:56,415 INFO L226 Difference]: Without dead ends: 6129 [2021-08-21 18:52:56,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6129 states. [2021-08-21 18:52:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6129 to 5410. [2021-08-21 18:52:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5410 states, 5409 states have (on average 1.894620077648364) internal successors, (10248), 5409 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 10248 transitions. [2021-08-21 18:52:56,474 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 10248 transitions. Word has length 29 [2021-08-21 18:52:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:56,474 INFO L470 AbstractCegarLoop]: Abstraction has 5410 states and 10248 transitions. [2021-08-21 18:52:56,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 10248 transitions. [2021-08-21 18:52:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:56,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:56,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:56,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:56,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:52:56,697 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash -753835995, now seen corresponding path program 1 times [2021-08-21 18:52:56,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:56,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030491083] [2021-08-21 18:52:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:56,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:56,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:56,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030491083] [2021-08-21 18:52:56,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030491083] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:56,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:56,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:56,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763553599] [2021-08-21 18:52:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:56,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:56,736 INFO L87 Difference]: Start difference. First operand 5410 states and 10248 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:56,794 INFO L93 Difference]: Finished difference Result 6288 states and 11976 transitions. [2021-08-21 18:52:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:56,802 INFO L225 Difference]: With dead ends: 6288 [2021-08-21 18:52:56,802 INFO L226 Difference]: Without dead ends: 6280 [2021-08-21 18:52:56,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2021-08-21 18:52:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 5444. [2021-08-21 18:52:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5444 states, 5443 states have (on average 1.905383060812052) internal successors, (10371), 5443 states have internal predecessors, (10371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5444 states to 5444 states and 10371 transitions. [2021-08-21 18:52:56,863 INFO L78 Accepts]: Start accepts. Automaton has 5444 states and 10371 transitions. Word has length 29 [2021-08-21 18:52:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 5444 states and 10371 transitions. [2021-08-21 18:52:56,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5444 states and 10371 transitions. [2021-08-21 18:52:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:56,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:56,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 18:52:56,872 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash 567458409, now seen corresponding path program 2 times [2021-08-21 18:52:56,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:56,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314455928] [2021-08-21 18:52:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:56,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:56,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:56,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314455928] [2021-08-21 18:52:56,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314455928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:56,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37830735] [2021-08-21 18:52:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:56,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:56,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:56,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:52:57,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:57,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37830735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:57,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:57,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:57,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186801876] [2021-08-21 18:52:57,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:57,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:57,386 INFO L87 Difference]: Start difference. First operand 5444 states and 10371 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:57,447 INFO L93 Difference]: Finished difference Result 6235 states and 11944 transitions. [2021-08-21 18:52:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:57,455 INFO L225 Difference]: With dead ends: 6235 [2021-08-21 18:52:57,455 INFO L226 Difference]: Without dead ends: 6227 [2021-08-21 18:52:57,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2021-08-21 18:52:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 5469. [2021-08-21 18:52:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5469 states, 5468 states have (on average 1.9147768836869057) internal successors, (10470), 5468 states have internal predecessors, (10470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5469 states to 5469 states and 10470 transitions. [2021-08-21 18:52:57,513 INFO L78 Accepts]: Start accepts. Automaton has 5469 states and 10470 transitions. Word has length 29 [2021-08-21 18:52:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 5469 states and 10470 transitions. [2021-08-21 18:52:57,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5469 states and 10470 transitions. [2021-08-21 18:52:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:57,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:57,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:57,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:57,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:52:57,736 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1181637097, now seen corresponding path program 2 times [2021-08-21 18:52:57,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:57,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128599248] [2021-08-21 18:52:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:57,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:57,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:57,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128599248] [2021-08-21 18:52:57,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128599248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:57,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314393007] [2021-08-21 18:52:57,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:57,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:57,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:57,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:52:58,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:58,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:58,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314393007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:58,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:58,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:58,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273692910] [2021-08-21 18:52:58,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:58,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:58,238 INFO L87 Difference]: Start difference. First operand 5469 states and 10470 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:58,294 INFO L93 Difference]: Finished difference Result 6218 states and 11924 transitions. [2021-08-21 18:52:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:58,301 INFO L225 Difference]: With dead ends: 6218 [2021-08-21 18:52:58,301 INFO L226 Difference]: Without dead ends: 6210 [2021-08-21 18:52:58,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:58,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6210 states. [2021-08-21 18:52:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6210 to 5499. [2021-08-21 18:52:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 5498 states have (on average 1.921244088759549) internal successors, (10563), 5498 states have internal predecessors, (10563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 10563 transitions. [2021-08-21 18:52:58,357 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 10563 transitions. Word has length 29 [2021-08-21 18:52:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 10563 transitions. [2021-08-21 18:52:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 10563 transitions. [2021-08-21 18:52:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:58,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:58,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:58,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:58,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:58,579 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -278969491, now seen corresponding path program 2 times [2021-08-21 18:52:58,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:58,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457806596] [2021-08-21 18:52:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:58,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:58,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:58,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457806596] [2021-08-21 18:52:58,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457806596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:58,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707207203] [2021-08-21 18:52:58,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:58,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:58,626 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:58,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:52:58,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:58,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:59,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707207203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:59,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:59,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:59,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92701394] [2021-08-21 18:52:59,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:59,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,103 INFO L87 Difference]: Start difference. First operand 5499 states and 10563 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:59,156 INFO L93 Difference]: Finished difference Result 6223 states and 11943 transitions. [2021-08-21 18:52:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:59,164 INFO L225 Difference]: With dead ends: 6223 [2021-08-21 18:52:59,164 INFO L226 Difference]: Without dead ends: 6215 [2021-08-21 18:52:59,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2021-08-21 18:52:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 5524. [2021-08-21 18:52:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.9252217997465146) internal successors, (10633), 5523 states have internal predecessors, (10633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 10633 transitions. [2021-08-21 18:52:59,220 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 10633 transitions. Word has length 29 [2021-08-21 18:52:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:59,221 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 10633 transitions. [2021-08-21 18:52:59,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 10633 transitions. [2021-08-21 18:52:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:59,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:59,227 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:59,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:59,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:59,444 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1574419585, now seen corresponding path program 1 times [2021-08-21 18:52:59,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:59,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063110675] [2021-08-21 18:52:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:59,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:59,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:59,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063110675] [2021-08-21 18:52:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063110675] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:59,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:59,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:59,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498476475] [2021-08-21 18:52:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:59,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,495 INFO L87 Difference]: Start difference. First operand 5524 states and 10633 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:59,552 INFO L93 Difference]: Finished difference Result 6316 states and 12099 transitions. [2021-08-21 18:52:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:59,559 INFO L225 Difference]: With dead ends: 6316 [2021-08-21 18:52:59,560 INFO L226 Difference]: Without dead ends: 6304 [2021-08-21 18:52:59,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-08-21 18:52:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 5536. [2021-08-21 18:52:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5536 states, 5535 states have (on average 1.9289972899728998) internal successors, (10677), 5535 states have internal predecessors, (10677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5536 states to 5536 states and 10677 transitions. [2021-08-21 18:52:59,615 INFO L78 Accepts]: Start accepts. Automaton has 5536 states and 10677 transitions. Word has length 29 [2021-08-21 18:52:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:59,615 INFO L470 AbstractCegarLoop]: Abstraction has 5536 states and 10677 transitions. [2021-08-21 18:52:59,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5536 states and 10677 transitions. [2021-08-21 18:52:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:59,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:59,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:59,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-21 18:52:59,624 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1192859893, now seen corresponding path program 1 times [2021-08-21 18:52:59,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:59,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72227130] [2021-08-21 18:52:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:59,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:59,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:59,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72227130] [2021-08-21 18:52:59,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72227130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:59,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:59,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:59,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074502290] [2021-08-21 18:52:59,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:59,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,670 INFO L87 Difference]: Start difference. First operand 5536 states and 10677 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:59,731 INFO L93 Difference]: Finished difference Result 6426 states and 12472 transitions. [2021-08-21 18:52:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:59,739 INFO L225 Difference]: With dead ends: 6426 [2021-08-21 18:52:59,739 INFO L226 Difference]: Without dead ends: 6418 [2021-08-21 18:52:59,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2021-08-21 18:52:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 5574. [2021-08-21 18:52:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5574 states, 5573 states have (on average 1.9407859321729768) internal successors, (10816), 5573 states have internal predecessors, (10816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 10816 transitions. [2021-08-21 18:52:59,837 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 10816 transitions. Word has length 29 [2021-08-21 18:52:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:59,837 INFO L470 AbstractCegarLoop]: Abstraction has 5574 states and 10816 transitions. [2021-08-21 18:52:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 10816 transitions. [2021-08-21 18:52:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:59,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:59,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-21 18:52:59,845 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:52:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1410603927, now seen corresponding path program 1 times [2021-08-21 18:52:59,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:59,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989744735] [2021-08-21 18:52:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:59,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989744735] [2021-08-21 18:52:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989744735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:59,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:59,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960964813] [2021-08-21 18:52:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:59,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,894 INFO L87 Difference]: Start difference. First operand 5574 states and 10816 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:59,959 INFO L93 Difference]: Finished difference Result 6418 states and 12496 transitions. [2021-08-21 18:52:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:59,967 INFO L225 Difference]: With dead ends: 6418 [2021-08-21 18:52:59,967 INFO L226 Difference]: Without dead ends: 6410 [2021-08-21 18:52:59,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2021-08-21 18:53:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 5588. [2021-08-21 18:53:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5587 states have (on average 1.9464829067478073) internal successors, (10875), 5587 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 10875 transitions. [2021-08-21 18:53:00,027 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 10875 transitions. Word has length 29 [2021-08-21 18:53:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 5588 states and 10875 transitions. [2021-08-21 18:53:00,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 10875 transitions. [2021-08-21 18:53:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:00,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:00,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-21 18:53:00,033 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1529124857, now seen corresponding path program 2 times [2021-08-21 18:53:00,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329962221] [2021-08-21 18:53:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329962221] [2021-08-21 18:53:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329962221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394377500] [2021-08-21 18:53:00,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:00,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:00,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:00,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:53:00,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:00,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:00,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:00,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394377500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:00,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:00,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:00,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655942590] [2021-08-21 18:53:00,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:00,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:00,597 INFO L87 Difference]: Start difference. First operand 5588 states and 10875 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:00,671 INFO L93 Difference]: Finished difference Result 6314 states and 12332 transitions. [2021-08-21 18:53:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:00,679 INFO L225 Difference]: With dead ends: 6314 [2021-08-21 18:53:00,679 INFO L226 Difference]: Without dead ends: 6306 [2021-08-21 18:53:00,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2021-08-21 18:53:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 5604. [2021-08-21 18:53:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 1.953774763519543) internal successors, (10947), 5603 states have internal predecessors, (10947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 10947 transitions. [2021-08-21 18:53:00,750 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 10947 transitions. Word has length 29 [2021-08-21 18:53:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 5604 states and 10947 transitions. [2021-08-21 18:53:00,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 10947 transitions. [2021-08-21 18:53:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:00,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:00,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:00,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 18:53:00,973 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 750942697, now seen corresponding path program 2 times [2021-08-21 18:53:00,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881283564] [2021-08-21 18:53:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:01,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881283564] [2021-08-21 18:53:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881283564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441120437] [2021-08-21 18:53:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:01,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:01,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:01,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:53:01,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:01,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441120437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:01,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219305254] [2021-08-21 18:53:01,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:01,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:01,538 INFO L87 Difference]: Start difference. First operand 5604 states and 10947 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:01,610 INFO L93 Difference]: Finished difference Result 6361 states and 12506 transitions. [2021-08-21 18:53:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:01,619 INFO L225 Difference]: With dead ends: 6361 [2021-08-21 18:53:01,619 INFO L226 Difference]: Without dead ends: 6353 [2021-08-21 18:53:01,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2021-08-21 18:53:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 5634. [2021-08-21 18:53:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5633 states have (on average 1.9662701935025741) internal successors, (11076), 5633 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 11076 transitions. [2021-08-21 18:53:01,682 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 11076 transitions. Word has length 29 [2021-08-21 18:53:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:01,682 INFO L470 AbstractCegarLoop]: Abstraction has 5634 states and 11076 transitions. [2021-08-21 18:53:01,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 11076 transitions. [2021-08-21 18:53:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:01,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:01,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:01,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 18:53:01,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,910 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash -423813251, now seen corresponding path program 2 times [2021-08-21 18:53:01,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:01,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159161277] [2021-08-21 18:53:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:01,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:01,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159161277] [2021-08-21 18:53:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159161277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170577607] [2021-08-21 18:53:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:01,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:01,952 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:53:02,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170577607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:02,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:02,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:02,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906289043] [2021-08-21 18:53:02,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:02,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:02,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:02,525 INFO L87 Difference]: Start difference. First operand 5634 states and 11076 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:02,586 INFO L93 Difference]: Finished difference Result 6314 states and 12416 transitions. [2021-08-21 18:53:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:02,594 INFO L225 Difference]: With dead ends: 6314 [2021-08-21 18:53:02,594 INFO L226 Difference]: Without dead ends: 6306 [2021-08-21 18:53:02,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2021-08-21 18:53:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 5639. [2021-08-21 18:53:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5639 states, 5638 states have (on average 1.968783256473927) internal successors, (11100), 5638 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5639 states to 5639 states and 11100 transitions. [2021-08-21 18:53:02,655 INFO L78 Accepts]: Start accepts. Automaton has 5639 states and 11100 transitions. Word has length 29 [2021-08-21 18:53:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 5639 states and 11100 transitions. [2021-08-21 18:53:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5639 states and 11100 transitions. [2021-08-21 18:53:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:02,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:02,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:02,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:53:02,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:02,879 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1201995411, now seen corresponding path program 2 times [2021-08-21 18:53:02,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:02,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721245090] [2021-08-21 18:53:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:02,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:02,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721245090] [2021-08-21 18:53:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721245090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499366030] [2021-08-21 18:53:02,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:02,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:02,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:02,916 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:02,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:53:03,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:03,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499366030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:03,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:03,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568131401] [2021-08-21 18:53:03,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:03,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:03,482 INFO L87 Difference]: Start difference. First operand 5639 states and 11100 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:03,552 INFO L93 Difference]: Finished difference Result 6386 states and 12645 transitions. [2021-08-21 18:53:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:03,561 INFO L225 Difference]: With dead ends: 6386 [2021-08-21 18:53:03,561 INFO L226 Difference]: Without dead ends: 6378 [2021-08-21 18:53:03,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6378 states. [2021-08-21 18:53:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6378 to 5659. [2021-08-21 18:53:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 1.9791445740544362) internal successors, (11198), 5658 states have internal predecessors, (11198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 11198 transitions. [2021-08-21 18:53:03,622 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 11198 transitions. Word has length 29 [2021-08-21 18:53:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,622 INFO L470 AbstractCegarLoop]: Abstraction has 5659 states and 11198 transitions. [2021-08-21 18:53:03,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 11198 transitions. [2021-08-21 18:53:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:03,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:03,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 18:53:03,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:03,848 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1140033777, now seen corresponding path program 2 times [2021-08-21 18:53:03,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:03,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787537354] [2021-08-21 18:53:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:03,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:03,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787537354] [2021-08-21 18:53:03,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787537354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921643870] [2021-08-21 18:53:03,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:03,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:03,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:03,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:03,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:53:04,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:04,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921643870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:04,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548249826] [2021-08-21 18:53:04,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:04,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,476 INFO L87 Difference]: Start difference. First operand 5659 states and 11198 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:04,552 INFO L93 Difference]: Finished difference Result 6420 states and 12769 transitions. [2021-08-21 18:53:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:04,562 INFO L225 Difference]: With dead ends: 6420 [2021-08-21 18:53:04,562 INFO L226 Difference]: Without dead ends: 6412 [2021-08-21 18:53:04,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-08-21 18:53:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 5684. [2021-08-21 18:53:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 1.98838641562555) internal successors, (11300), 5683 states have internal predecessors, (11300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 11300 transitions. [2021-08-21 18:53:04,624 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 11300 transitions. Word has length 29 [2021-08-21 18:53:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:04,624 INFO L470 AbstractCegarLoop]: Abstraction has 5684 states and 11300 transitions. [2021-08-21 18:53:04,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 11300 transitions. [2021-08-21 18:53:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:04,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:04,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:04,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:53:04,848 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:04,848 INFO L82 PathProgramCache]: Analyzing trace with hash -812904331, now seen corresponding path program 2 times [2021-08-21 18:53:04,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:04,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062619415] [2021-08-21 18:53:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:04,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:04,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:04,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062619415] [2021-08-21 18:53:04,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062619415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:04,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144815980] [2021-08-21 18:53:04,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:04,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:04,887 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:53:05,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:05,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144815980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:05,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:05,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:05,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230947477] [2021-08-21 18:53:05,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:05,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,527 INFO L87 Difference]: Start difference. First operand 5684 states and 11300 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:05,597 INFO L93 Difference]: Finished difference Result 6400 states and 12760 transitions. [2021-08-21 18:53:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:05,607 INFO L225 Difference]: With dead ends: 6400 [2021-08-21 18:53:05,607 INFO L226 Difference]: Without dead ends: 6392 [2021-08-21 18:53:05,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-08-21 18:53:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 5694. [2021-08-21 18:53:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 1.993852099069032) internal successors, (11351), 5693 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 11351 transitions. [2021-08-21 18:53:05,674 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 11351 transitions. Word has length 29 [2021-08-21 18:53:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:05,674 INFO L470 AbstractCegarLoop]: Abstraction has 5694 states and 11351 transitions. [2021-08-21 18:53:05,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 11351 transitions. [2021-08-21 18:53:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:05,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:05,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:05,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:53:05,909 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1517131349, now seen corresponding path program 1 times [2021-08-21 18:53:05,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:05,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981927471] [2021-08-21 18:53:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:05,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:05,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:05,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981927471] [2021-08-21 18:53:05,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981927471] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:05,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:05,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:05,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5242497] [2021-08-21 18:53:05,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:05,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:05,968 INFO L87 Difference]: Start difference. First operand 5694 states and 11351 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,051 INFO L93 Difference]: Finished difference Result 6816 states and 13573 transitions. [2021-08-21 18:53:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,061 INFO L225 Difference]: With dead ends: 6816 [2021-08-21 18:53:06,061 INFO L226 Difference]: Without dead ends: 6808 [2021-08-21 18:53:06,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6808 states. [2021-08-21 18:53:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6808 to 5671. [2021-08-21 18:53:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5671 states, 5670 states have (on average 1.9797178130511464) internal successors, (11225), 5670 states have internal predecessors, (11225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5671 states to 5671 states and 11225 transitions. [2021-08-21 18:53:06,128 INFO L78 Accepts]: Start accepts. Automaton has 5671 states and 11225 transitions. Word has length 32 [2021-08-21 18:53:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,128 INFO L470 AbstractCegarLoop]: Abstraction has 5671 states and 11225 transitions. [2021-08-21 18:53:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5671 states and 11225 transitions. [2021-08-21 18:53:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-21 18:53:06,136 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1875258205, now seen corresponding path program 1 times [2021-08-21 18:53:06,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172407840] [2021-08-21 18:53:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172407840] [2021-08-21 18:53:06,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172407840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:06,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:06,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:06,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077719986] [2021-08-21 18:53:06,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:06,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,186 INFO L87 Difference]: Start difference. First operand 5671 states and 11225 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,264 INFO L93 Difference]: Finished difference Result 6751 states and 13298 transitions. [2021-08-21 18:53:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,274 INFO L225 Difference]: With dead ends: 6751 [2021-08-21 18:53:06,275 INFO L226 Difference]: Without dead ends: 6739 [2021-08-21 18:53:06,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6739 states. [2021-08-21 18:53:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6739 to 5706. [2021-08-21 18:53:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5706 states, 5705 states have (on average 1.9861524978089395) internal successors, (11331), 5705 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5706 states to 5706 states and 11331 transitions. [2021-08-21 18:53:06,332 INFO L78 Accepts]: Start accepts. Automaton has 5706 states and 11331 transitions. Word has length 32 [2021-08-21 18:53:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,332 INFO L470 AbstractCegarLoop]: Abstraction has 5706 states and 11331 transitions. [2021-08-21 18:53:06,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5706 states and 11331 transitions. [2021-08-21 18:53:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-21 18:53:06,338 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:06,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1921192201, now seen corresponding path program 1 times [2021-08-21 18:53:06,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595341625] [2021-08-21 18:53:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595341625] [2021-08-21 18:53:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595341625] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:06,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:06,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:06,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605936648] [2021-08-21 18:53:06,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:06,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,388 INFO L87 Difference]: Start difference. First operand 5706 states and 11331 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,469 INFO L93 Difference]: Finished difference Result 6845 states and 13569 transitions. [2021-08-21 18:53:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:06,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,481 INFO L225 Difference]: With dead ends: 6845 [2021-08-21 18:53:06,481 INFO L226 Difference]: Without dead ends: 6837 [2021-08-21 18:53:06,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2021-08-21 18:53:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 5713. [2021-08-21 18:53:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 1.9800420168067228) internal successors, (11310), 5712 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 11310 transitions. [2021-08-21 18:53:06,543 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 11310 transitions. Word has length 32 [2021-08-21 18:53:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 5713 states and 11310 transitions. [2021-08-21 18:53:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 11310 transitions. [2021-08-21 18:53:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-21 18:53:06,550 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1530470349, now seen corresponding path program 1 times [2021-08-21 18:53:06,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223982103] [2021-08-21 18:53:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223982103] [2021-08-21 18:53:06,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223982103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:06,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:06,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:06,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047226848] [2021-08-21 18:53:06,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:06,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,599 INFO L87 Difference]: Start difference. First operand 5713 states and 11310 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,675 INFO L93 Difference]: Finished difference Result 6797 states and 13409 transitions. [2021-08-21 18:53:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,685 INFO L225 Difference]: With dead ends: 6797 [2021-08-21 18:53:06,685 INFO L226 Difference]: Without dead ends: 6789 [2021-08-21 18:53:06,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6789 states. [2021-08-21 18:53:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6789 to 5716. [2021-08-21 18:53:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5715 states have (on average 1.9746281714785652) internal successors, (11285), 5715 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 11285 transitions. [2021-08-21 18:53:06,753 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 11285 transitions. Word has length 32 [2021-08-21 18:53:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,753 INFO L470 AbstractCegarLoop]: Abstraction has 5716 states and 11285 transitions. [2021-08-21 18:53:06,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 11285 transitions. [2021-08-21 18:53:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-21 18:53:06,762 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 691433779, now seen corresponding path program 1 times [2021-08-21 18:53:06,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677915232] [2021-08-21 18:53:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677915232] [2021-08-21 18:53:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677915232] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:06,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:06,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:06,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116416033] [2021-08-21 18:53:06,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:06,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,822 INFO L87 Difference]: Start difference. First operand 5716 states and 11285 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,907 INFO L93 Difference]: Finished difference Result 6802 states and 13379 transitions. [2021-08-21 18:53:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,916 INFO L225 Difference]: With dead ends: 6802 [2021-08-21 18:53:06,916 INFO L226 Difference]: Without dead ends: 6794 [2021-08-21 18:53:06,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-08-21 18:53:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 5720. [2021-08-21 18:53:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 1.9655534184297954) internal successors, (11241), 5719 states have internal predecessors, (11241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 11241 transitions. [2021-08-21 18:53:06,988 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 11241 transitions. Word has length 32 [2021-08-21 18:53:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,988 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 11241 transitions. [2021-08-21 18:53:06,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 11241 transitions. [2021-08-21 18:53:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,995 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-21 18:53:06,995 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 836962387, now seen corresponding path program 2 times [2021-08-21 18:53:06,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197069075] [2021-08-21 18:53:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:07,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:07,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197069075] [2021-08-21 18:53:07,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197069075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:07,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100851337] [2021-08-21 18:53:07,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:07,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:07,089 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:07,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:53:07,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:07,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:07,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100851337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:07,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:07,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:07,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774549949] [2021-08-21 18:53:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:07,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:07,783 INFO L87 Difference]: Start difference. First operand 5720 states and 11241 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:07,864 INFO L93 Difference]: Finished difference Result 6783 states and 13460 transitions. [2021-08-21 18:53:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:07,872 INFO L225 Difference]: With dead ends: 6783 [2021-08-21 18:53:07,872 INFO L226 Difference]: Without dead ends: 6775 [2021-08-21 18:53:07,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2021-08-21 18:53:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 5776. [2021-08-21 18:53:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 1.9894372294372293) internal successors, (11489), 5775 states have internal predecessors, (11489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 11489 transitions. [2021-08-21 18:53:07,937 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 11489 transitions. Word has length 32 [2021-08-21 18:53:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:07,937 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 11489 transitions. [2021-08-21 18:53:07,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 11489 transitions. [2021-08-21 18:53:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:07,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:07,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:07,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:08,154 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1121970733, now seen corresponding path program 1 times [2021-08-21 18:53:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422315172] [2021-08-21 18:53:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:08,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422315172] [2021-08-21 18:53:08,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422315172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:08,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112642564] [2021-08-21 18:53:08,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:08,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,209 INFO L87 Difference]: Start difference. First operand 5776 states and 11489 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,288 INFO L93 Difference]: Finished difference Result 6881 states and 13633 transitions. [2021-08-21 18:53:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,297 INFO L225 Difference]: With dead ends: 6881 [2021-08-21 18:53:08,297 INFO L226 Difference]: Without dead ends: 6869 [2021-08-21 18:53:08,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6869 states. [2021-08-21 18:53:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6869 to 5811. [2021-08-21 18:53:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 5810 states have (on average 1.9974182444061963) internal successors, (11605), 5810 states have internal predecessors, (11605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 11605 transitions. [2021-08-21 18:53:08,360 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 11605 transitions. Word has length 32 [2021-08-21 18:53:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,360 INFO L470 AbstractCegarLoop]: Abstraction has 5811 states and 11605 transitions. [2021-08-21 18:53:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 11605 transitions. [2021-08-21 18:53:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:08,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:08,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-21 18:53:08,367 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:08,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1167904729, now seen corresponding path program 1 times [2021-08-21 18:53:08,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802320840] [2021-08-21 18:53:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:08,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802320840] [2021-08-21 18:53:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802320840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:08,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709840057] [2021-08-21 18:53:08,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:08,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,415 INFO L87 Difference]: Start difference. First operand 5811 states and 11605 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,499 INFO L93 Difference]: Finished difference Result 7008 states and 14065 transitions. [2021-08-21 18:53:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,508 INFO L225 Difference]: With dead ends: 7008 [2021-08-21 18:53:08,508 INFO L226 Difference]: Without dead ends: 7000 [2021-08-21 18:53:08,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7000 states. [2021-08-21 18:53:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7000 to 5882. [2021-08-21 18:53:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5882 states, 5881 states have (on average 2.020574732188403) internal successors, (11883), 5881 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 11883 transitions. [2021-08-21 18:53:08,567 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 11883 transitions. Word has length 32 [2021-08-21 18:53:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 5882 states and 11883 transitions. [2021-08-21 18:53:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 11883 transitions. [2021-08-21 18:53:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:08,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:08,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-21 18:53:08,574 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -777182877, now seen corresponding path program 1 times [2021-08-21 18:53:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212615195] [2021-08-21 18:53:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:08,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212615195] [2021-08-21 18:53:08,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212615195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:08,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143708300] [2021-08-21 18:53:08,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:08,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:08,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,626 INFO L87 Difference]: Start difference. First operand 5882 states and 11883 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,714 INFO L93 Difference]: Finished difference Result 7037 states and 14243 transitions. [2021-08-21 18:53:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,723 INFO L225 Difference]: With dead ends: 7037 [2021-08-21 18:53:08,724 INFO L226 Difference]: Without dead ends: 7029 [2021-08-21 18:53:08,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2021-08-21 18:53:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 5928. [2021-08-21 18:53:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.036105955795512) internal successors, (12068), 5927 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 12068 transitions. [2021-08-21 18:53:08,792 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 12068 transitions. Word has length 32 [2021-08-21 18:53:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,792 INFO L470 AbstractCegarLoop]: Abstraction has 5928 states and 12068 transitions. [2021-08-21 18:53:08,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 12068 transitions. [2021-08-21 18:53:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:08,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:08,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-21 18:53:08,800 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:08,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1444721251, now seen corresponding path program 1 times [2021-08-21 18:53:08,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347059954] [2021-08-21 18:53:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:08,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347059954] [2021-08-21 18:53:08,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347059954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:08,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061651734] [2021-08-21 18:53:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:08,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,849 INFO L87 Difference]: Start difference. First operand 5928 states and 12068 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,940 INFO L93 Difference]: Finished difference Result 7074 states and 14438 transitions. [2021-08-21 18:53:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:08,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,950 INFO L225 Difference]: With dead ends: 7074 [2021-08-21 18:53:08,950 INFO L226 Difference]: Without dead ends: 7066 [2021-08-21 18:53:08,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2021-08-21 18:53:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 5989. [2021-08-21 18:53:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 5988 states have (on average 2.064128256513026) internal successors, (12360), 5988 states have internal predecessors, (12360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 12360 transitions. [2021-08-21 18:53:09,022 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 12360 transitions. Word has length 32 [2021-08-21 18:53:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,022 INFO L470 AbstractCegarLoop]: Abstraction has 5989 states and 12360 transitions. [2021-08-21 18:53:09,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 12360 transitions. [2021-08-21 18:53:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:09,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-21 18:53:09,029 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1660040795, now seen corresponding path program 2 times [2021-08-21 18:53:09,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441557978] [2021-08-21 18:53:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:09,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:09,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441557978] [2021-08-21 18:53:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441557978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533798512] [2021-08-21 18:53:09,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:09,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:09,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:09,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:53:09,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533798512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:09,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859532350] [2021-08-21 18:53:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:09,823 INFO L87 Difference]: Start difference. First operand 5989 states and 12360 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,911 INFO L93 Difference]: Finished difference Result 7067 states and 14575 transitions. [2021-08-21 18:53:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:09,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,921 INFO L225 Difference]: With dead ends: 7067 [2021-08-21 18:53:09,921 INFO L226 Difference]: Without dead ends: 7059 [2021-08-21 18:53:09,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2021-08-21 18:53:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 6019. [2021-08-21 18:53:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6019 states, 6018 states have (on average 2.072781655034895) internal successors, (12474), 6018 states have internal predecessors, (12474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 12474 transitions. [2021-08-21 18:53:09,996 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 12474 transitions. Word has length 32 [2021-08-21 18:53:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,996 INFO L470 AbstractCegarLoop]: Abstraction has 6019 states and 12474 transitions. [2021-08-21 18:53:09,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 12474 transitions. [2021-08-21 18:53:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:10,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:10,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:10,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 18:53:10,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:10,230 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1248501591, now seen corresponding path program 2 times [2021-08-21 18:53:10,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:10,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46407045] [2021-08-21 18:53:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:10,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:10,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:10,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46407045] [2021-08-21 18:53:10,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46407045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031484243] [2021-08-21 18:53:10,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:10,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:10,279 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:10,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:53:10,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:10,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031484243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:10,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:10,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175402595] [2021-08-21 18:53:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:10,971 INFO L87 Difference]: Start difference. First operand 6019 states and 12474 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:11,061 INFO L93 Difference]: Finished difference Result 7046 states and 14571 transitions. [2021-08-21 18:53:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:11,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:11,072 INFO L225 Difference]: With dead ends: 7046 [2021-08-21 18:53:11,072 INFO L226 Difference]: Without dead ends: 7038 [2021-08-21 18:53:11,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-08-21 18:53:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 6037. [2021-08-21 18:53:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 2.0795228628230618) internal successors, (12552), 6036 states have internal predecessors, (12552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 12552 transitions. [2021-08-21 18:53:11,143 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 12552 transitions. Word has length 32 [2021-08-21 18:53:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:11,143 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 12552 transitions. [2021-08-21 18:53:11,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 12552 transitions. [2021-08-21 18:53:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:11,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:11,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:11,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:11,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,367 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash -114927397, now seen corresponding path program 2 times [2021-08-21 18:53:11,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:11,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986038365] [2021-08-21 18:53:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:11,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:11,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:11,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986038365] [2021-08-21 18:53:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986038365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454264619] [2021-08-21 18:53:11,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:11,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:11,419 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:11,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:53:11,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:11,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:12,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454264619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:12,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:12,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:12,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402531587] [2021-08-21 18:53:12,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:12,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:12,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:12,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:12,145 INFO L87 Difference]: Start difference. First operand 6037 states and 12552 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:12,217 INFO L93 Difference]: Finished difference Result 7012 states and 14436 transitions. [2021-08-21 18:53:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:12,226 INFO L225 Difference]: With dead ends: 7012 [2021-08-21 18:53:12,227 INFO L226 Difference]: Without dead ends: 7004 [2021-08-21 18:53:12,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7004 states. [2021-08-21 18:53:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7004 to 6028. [2021-08-21 18:53:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.0774846523975445) internal successors, (12521), 6027 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 12521 transitions. [2021-08-21 18:53:12,287 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 12521 transitions. Word has length 32 [2021-08-21 18:53:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:12,287 INFO L470 AbstractCegarLoop]: Abstraction has 6028 states and 12521 transitions. [2021-08-21 18:53:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 12521 transitions. [2021-08-21 18:53:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:12,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:12,293 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:12,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:12,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 18:53:12,509 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1759912985, now seen corresponding path program 2 times [2021-08-21 18:53:12,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:12,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344576472] [2021-08-21 18:53:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:12,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:12,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344576472] [2021-08-21 18:53:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344576472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133480959] [2021-08-21 18:53:12,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:12,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:12,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:12,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:12,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:53:13,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:13,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:13,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133480959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:13,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:13,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:13,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877372540] [2021-08-21 18:53:13,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:13,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,301 INFO L87 Difference]: Start difference. First operand 6028 states and 12521 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,385 INFO L93 Difference]: Finished difference Result 7002 states and 14451 transitions. [2021-08-21 18:53:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:13,395 INFO L225 Difference]: With dead ends: 7002 [2021-08-21 18:53:13,395 INFO L226 Difference]: Without dead ends: 6994 [2021-08-21 18:53:13,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2021-08-21 18:53:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 6022. [2021-08-21 18:53:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6022 states, 6021 states have (on average 2.0730775618667994) internal successors, (12482), 6021 states have internal predecessors, (12482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 12482 transitions. [2021-08-21 18:53:13,465 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 12482 transitions. Word has length 32 [2021-08-21 18:53:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:13,466 INFO L470 AbstractCegarLoop]: Abstraction has 6022 states and 12482 transitions. [2021-08-21 18:53:13,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 12482 transitions. [2021-08-21 18:53:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:13,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:13,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:13,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 18:53:13,690 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1426308561, now seen corresponding path program 1 times [2021-08-21 18:53:13,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951217550] [2021-08-21 18:53:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:13,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951217550] [2021-08-21 18:53:13,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951217550] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:13,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:13,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:13,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474602520] [2021-08-21 18:53:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:13,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,737 INFO L87 Difference]: Start difference. First operand 6022 states and 12482 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,813 INFO L93 Difference]: Finished difference Result 7115 states and 14599 transitions. [2021-08-21 18:53:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:13,822 INFO L225 Difference]: With dead ends: 7115 [2021-08-21 18:53:13,822 INFO L226 Difference]: Without dead ends: 7103 [2021-08-21 18:53:13,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7103 states. [2021-08-21 18:53:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7103 to 6046. [2021-08-21 18:53:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 6045 states have (on average 2.077584780810587) internal successors, (12559), 6045 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 12559 transitions. [2021-08-21 18:53:13,883 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 12559 transitions. Word has length 32 [2021-08-21 18:53:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:13,884 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 12559 transitions. [2021-08-21 18:53:13,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 12559 transitions. [2021-08-21 18:53:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:13,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:13,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-21 18:53:13,890 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1035586709, now seen corresponding path program 1 times [2021-08-21 18:53:13,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478559839] [2021-08-21 18:53:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:13,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478559839] [2021-08-21 18:53:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478559839] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:13,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:13,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:13,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692404323] [2021-08-21 18:53:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,938 INFO L87 Difference]: Start difference. First operand 6046 states and 12559 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,011 INFO L93 Difference]: Finished difference Result 7090 states and 14565 transitions. [2021-08-21 18:53:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,020 INFO L225 Difference]: With dead ends: 7090 [2021-08-21 18:53:14,020 INFO L226 Difference]: Without dead ends: 7078 [2021-08-21 18:53:14,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7078 states. [2021-08-21 18:53:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7078 to 6060. [2021-08-21 18:53:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 2.0802112559828356) internal successors, (12604), 6059 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 12604 transitions. [2021-08-21 18:53:14,080 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 12604 transitions. Word has length 32 [2021-08-21 18:53:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:14,080 INFO L470 AbstractCegarLoop]: Abstraction has 6060 states and 12604 transitions. [2021-08-21 18:53:14,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 12604 transitions. [2021-08-21 18:53:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:14,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:14,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:14,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-21 18:53:14,087 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash -368530985, now seen corresponding path program 2 times [2021-08-21 18:53:14,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:14,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587635663] [2021-08-21 18:53:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:14,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:14,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:14,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587635663] [2021-08-21 18:53:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587635663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919068104] [2021-08-21 18:53:14,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:14,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:14,158 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:14,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:53:14,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:14,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919068104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:14,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:14,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123435817] [2021-08-21 18:53:14,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:14,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:14,911 INFO L87 Difference]: Start difference. First operand 6060 states and 12604 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,992 INFO L93 Difference]: Finished difference Result 7105 states and 14685 transitions. [2021-08-21 18:53:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:15,001 INFO L225 Difference]: With dead ends: 7105 [2021-08-21 18:53:15,001 INFO L226 Difference]: Without dead ends: 7097 [2021-08-21 18:53:15,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7097 states. [2021-08-21 18:53:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7097 to 6084. [2021-08-21 18:53:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6084 states, 6083 states have (on average 2.0851553509781358) internal successors, (12684), 6083 states have internal predecessors, (12684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 12684 transitions. [2021-08-21 18:53:15,064 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 12684 transitions. Word has length 32 [2021-08-21 18:53:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:15,064 INFO L470 AbstractCegarLoop]: Abstraction has 6084 states and 12684 transitions. [2021-08-21 18:53:15,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 12684 transitions. [2021-08-21 18:53:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:15,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:15,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:15,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:15,283 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:15,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1597305043, now seen corresponding path program 2 times [2021-08-21 18:53:15,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:15,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142295896] [2021-08-21 18:53:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:15,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:15,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142295896] [2021-08-21 18:53:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142295896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602440083] [2021-08-21 18:53:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:15,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:15,332 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:15,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:53:15,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:16,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602440083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:16,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:16,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:16,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536961955] [2021-08-21 18:53:16,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:16,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:16,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:16,121 INFO L87 Difference]: Start difference. First operand 6084 states and 12684 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:16,205 INFO L93 Difference]: Finished difference Result 7073 states and 14626 transitions. [2021-08-21 18:53:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:16,215 INFO L225 Difference]: With dead ends: 7073 [2021-08-21 18:53:16,215 INFO L226 Difference]: Without dead ends: 7065 [2021-08-21 18:53:16,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-08-21 18:53:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 6096. [2021-08-21 18:53:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 2.0882690730106646) internal successors, (12728), 6095 states have internal predecessors, (12728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 12728 transitions. [2021-08-21 18:53:16,280 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 12728 transitions. Word has length 32 [2021-08-21 18:53:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 6096 states and 12728 transitions. [2021-08-21 18:53:16,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 12728 transitions. [2021-08-21 18:53:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:16,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:16,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:16,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:16,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:16,505 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash 639305879, now seen corresponding path program 1 times [2021-08-21 18:53:16,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:16,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677760893] [2021-08-21 18:53:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:16,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:16,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:16,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677760893] [2021-08-21 18:53:16,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677760893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:16,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:16,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916359076] [2021-08-21 18:53:16,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:16,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:16,553 INFO L87 Difference]: Start difference. First operand 6096 states and 12728 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:16,634 INFO L93 Difference]: Finished difference Result 7227 states and 14978 transitions. [2021-08-21 18:53:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:16,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:16,643 INFO L225 Difference]: With dead ends: 7227 [2021-08-21 18:53:16,644 INFO L226 Difference]: Without dead ends: 7219 [2021-08-21 18:53:16,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7219 states. [2021-08-21 18:53:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7219 to 6119. [2021-08-21 18:53:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 2.0941484145145473) internal successors, (12812), 6118 states have internal predecessors, (12812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 12812 transitions. [2021-08-21 18:53:16,764 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 12812 transitions. Word has length 32 [2021-08-21 18:53:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 6119 states and 12812 transitions. [2021-08-21 18:53:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 12812 transitions. [2021-08-21 18:53:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:16,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:16,772 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:16,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-21 18:53:16,772 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1960600283, now seen corresponding path program 2 times [2021-08-21 18:53:16,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:16,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141868047] [2021-08-21 18:53:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:16,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:16,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:16,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141868047] [2021-08-21 18:53:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141868047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:16,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59174560] [2021-08-21 18:53:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:16,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:16,820 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:16,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:53:17,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:17,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59174560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087885085] [2021-08-21 18:53:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:17,628 INFO L87 Difference]: Start difference. First operand 6119 states and 12812 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:17,712 INFO L93 Difference]: Finished difference Result 7150 states and 14886 transitions. [2021-08-21 18:53:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:17,721 INFO L225 Difference]: With dead ends: 7150 [2021-08-21 18:53:17,721 INFO L226 Difference]: Without dead ends: 7142 [2021-08-21 18:53:17,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7142 states. [2021-08-21 18:53:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7142 to 6128. [2021-08-21 18:53:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6128 states, 6127 states have (on average 2.0959686632936183) internal successors, (12842), 6127 states have internal predecessors, (12842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6128 states to 6128 states and 12842 transitions. [2021-08-21 18:53:17,784 INFO L78 Accepts]: Start accepts. Automaton has 6128 states and 12842 transitions. Word has length 32 [2021-08-21 18:53:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:17,784 INFO L470 AbstractCegarLoop]: Abstraction has 6128 states and 12842 transitions. [2021-08-21 18:53:17,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6128 states and 12842 transitions. [2021-08-21 18:53:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:17,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:17,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:17,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:18,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:53:18,008 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1720188325, now seen corresponding path program 2 times [2021-08-21 18:53:18,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:18,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949470390] [2021-08-21 18:53:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:18,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:18,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:18,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949470390] [2021-08-21 18:53:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949470390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:18,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505790898] [2021-08-21 18:53:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:18,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:18,057 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:18,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:53:18,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:18,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505790898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:18,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:18,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176246801] [2021-08-21 18:53:18,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:18,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:18,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:18,882 INFO L87 Difference]: Start difference. First operand 6128 states and 12842 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:18,960 INFO L93 Difference]: Finished difference Result 7108 states and 14772 transitions. [2021-08-21 18:53:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:18,969 INFO L225 Difference]: With dead ends: 7108 [2021-08-21 18:53:18,969 INFO L226 Difference]: Without dead ends: 7100 [2021-08-21 18:53:18,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2021-08-21 18:53:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 6146. [2021-08-21 18:53:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 2.099593165174939) internal successors, (12902), 6145 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 12902 transitions. [2021-08-21 18:53:19,033 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 12902 transitions. Word has length 32 [2021-08-21 18:53:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 12902 transitions. [2021-08-21 18:53:19,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 12902 transitions. [2021-08-21 18:53:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:19,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:19,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:19,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:19,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 18:53:19,307 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1114172383, now seen corresponding path program 2 times [2021-08-21 18:53:19,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:19,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037357312] [2021-08-21 18:53:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:19,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:19,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:19,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037357312] [2021-08-21 18:53:19,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037357312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:19,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998008147] [2021-08-21 18:53:19,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:19,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:19,363 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:19,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:53:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:20,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998008147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:20,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:20,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:20,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205561664] [2021-08-21 18:53:20,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:20,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,212 INFO L87 Difference]: Start difference. First operand 6146 states and 12902 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,288 INFO L93 Difference]: Finished difference Result 7089 states and 14735 transitions. [2021-08-21 18:53:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:20,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,297 INFO L225 Difference]: With dead ends: 7089 [2021-08-21 18:53:20,297 INFO L226 Difference]: Without dead ends: 7081 [2021-08-21 18:53:20,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-08-21 18:53:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6142. [2021-08-21 18:53:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.0964012375834553) internal successors, (12874), 6141 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 12874 transitions. [2021-08-21 18:53:20,363 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 12874 transitions. Word has length 32 [2021-08-21 18:53:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:20,363 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 12874 transitions. [2021-08-21 18:53:20,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 12874 transitions. [2021-08-21 18:53:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:20,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:20,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:20,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:20,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:20,586 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1327405837, now seen corresponding path program 1 times [2021-08-21 18:53:20,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721606717] [2021-08-21 18:53:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:20,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721606717] [2021-08-21 18:53:20,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721606717] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:20,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:20,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:20,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930358125] [2021-08-21 18:53:20,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:20,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,636 INFO L87 Difference]: Start difference. First operand 6142 states and 12874 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,722 INFO L93 Difference]: Finished difference Result 7188 states and 14839 transitions. [2021-08-21 18:53:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,734 INFO L225 Difference]: With dead ends: 7188 [2021-08-21 18:53:20,734 INFO L226 Difference]: Without dead ends: 7176 [2021-08-21 18:53:20,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-08-21 18:53:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 6153. [2021-08-21 18:53:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 2.0993172951885564) internal successors, (12915), 6152 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 12915 transitions. [2021-08-21 18:53:20,822 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 12915 transitions. Word has length 32 [2021-08-21 18:53:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:20,823 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 12915 transitions. [2021-08-21 18:53:20,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 12915 transitions. [2021-08-21 18:53:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:20,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:20,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:20,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-21 18:53:20,832 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1708965529, now seen corresponding path program 1 times [2021-08-21 18:53:20,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006373073] [2021-08-21 18:53:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:20,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006373073] [2021-08-21 18:53:20,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006373073] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:20,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:20,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:20,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143384647] [2021-08-21 18:53:20,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:20,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,884 INFO L87 Difference]: Start difference. First operand 6153 states and 12915 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,972 INFO L93 Difference]: Finished difference Result 7294 states and 15201 transitions. [2021-08-21 18:53:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,981 INFO L225 Difference]: With dead ends: 7294 [2021-08-21 18:53:20,981 INFO L226 Difference]: Without dead ends: 7286 [2021-08-21 18:53:20,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-08-21 18:53:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 6182. [2021-08-21 18:53:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6182 states, 6181 states have (on average 2.104352046594402) internal successors, (13007), 6181 states have internal predecessors, (13007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6182 states to 6182 states and 13007 transitions. [2021-08-21 18:53:21,045 INFO L78 Accepts]: Start accepts. Automaton has 6182 states and 13007 transitions. Word has length 32 [2021-08-21 18:53:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:21,046 INFO L470 AbstractCegarLoop]: Abstraction has 6182 states and 13007 transitions. [2021-08-21 18:53:21,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6182 states and 13007 transitions. [2021-08-21 18:53:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:21,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:21,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:21,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-21 18:53:21,054 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -17462053, now seen corresponding path program 1 times [2021-08-21 18:53:21,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:21,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379555507] [2021-08-21 18:53:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:21,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:21,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:21,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379555507] [2021-08-21 18:53:21,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379555507] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:21,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:21,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:21,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136025526] [2021-08-21 18:53:21,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:21,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:21,105 INFO L87 Difference]: Start difference. First operand 6182 states and 13007 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:21,193 INFO L93 Difference]: Finished difference Result 7267 states and 15163 transitions. [2021-08-21 18:53:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:21,203 INFO L225 Difference]: With dead ends: 7267 [2021-08-21 18:53:21,203 INFO L226 Difference]: Without dead ends: 7259 [2021-08-21 18:53:21,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7259 states. [2021-08-21 18:53:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7259 to 6192. [2021-08-21 18:53:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 2.1066063640768857) internal successors, (13042), 6191 states have internal predecessors, (13042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 13042 transitions. [2021-08-21 18:53:21,279 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 13042 transitions. Word has length 32 [2021-08-21 18:53:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:21,279 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 13042 transitions. [2021-08-21 18:53:21,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 13042 transitions. [2021-08-21 18:53:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:21,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:21,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:21,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-21 18:53:21,288 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1372700565, now seen corresponding path program 2 times [2021-08-21 18:53:21,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:21,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629966103] [2021-08-21 18:53:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:21,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:21,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:21,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629966103] [2021-08-21 18:53:21,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629966103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:21,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790306214] [2021-08-21 18:53:21,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:21,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:21,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:21,380 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:21,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:53:22,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:22,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790306214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:22,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:22,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815268820] [2021-08-21 18:53:22,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:22,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:22,274 INFO L87 Difference]: Start difference. First operand 6192 states and 13042 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:22,360 INFO L93 Difference]: Finished difference Result 7151 states and 14968 transitions. [2021-08-21 18:53:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:22,370 INFO L225 Difference]: With dead ends: 7151 [2021-08-21 18:53:22,370 INFO L226 Difference]: Without dead ends: 7143 [2021-08-21 18:53:22,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2021-08-21 18:53:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 6207. [2021-08-21 18:53:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6207 states, 6206 states have (on average 2.114244279729294) internal successors, (13121), 6206 states have internal predecessors, (13121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6207 states to 6207 states and 13121 transitions. [2021-08-21 18:53:22,445 INFO L78 Accepts]: Start accepts. Automaton has 6207 states and 13121 transitions. Word has length 32 [2021-08-21 18:53:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:22,446 INFO L470 AbstractCegarLoop]: Abstraction has 6207 states and 13121 transitions. [2021-08-21 18:53:22,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6207 states and 13121 transitions. [2021-08-21 18:53:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:22,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:22,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:22,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:22,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,679 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2144084571, now seen corresponding path program 3 times [2021-08-21 18:53:22,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:22,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480778895] [2021-08-21 18:53:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:22,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:22,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:22,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480778895] [2021-08-21 18:53:22,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480778895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327239358] [2021-08-21 18:53:22,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:22,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:22,728 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:22,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:53:23,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:23,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327239358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:23,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:23,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:23,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173664228] [2021-08-21 18:53:23,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:23,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:23,633 INFO L87 Difference]: Start difference. First operand 6207 states and 13121 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:23,731 INFO L93 Difference]: Finished difference Result 7194 states and 15135 transitions. [2021-08-21 18:53:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:23,740 INFO L225 Difference]: With dead ends: 7194 [2021-08-21 18:53:23,740 INFO L226 Difference]: Without dead ends: 7186 [2021-08-21 18:53:23,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-08-21 18:53:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6222. [2021-08-21 18:53:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.1205593955955635) internal successors, (13192), 6221 states have internal predecessors, (13192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 13192 transitions. [2021-08-21 18:53:23,806 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 13192 transitions. Word has length 32 [2021-08-21 18:53:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:23,806 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 13192 transitions. [2021-08-21 18:53:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 13192 transitions. [2021-08-21 18:53:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:23,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:23,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:23,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:24,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 18:53:24,029 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash 969328623, now seen corresponding path program 2 times [2021-08-21 18:53:24,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:24,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840387985] [2021-08-21 18:53:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:24,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:24,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:24,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840387985] [2021-08-21 18:53:24,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840387985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:24,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165543512] [2021-08-21 18:53:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:24,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:24,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:24,106 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:24,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:53:24,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:24,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:24,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:25,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165543512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:25,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903272112] [2021-08-21 18:53:25,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:25,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:25,030 INFO L87 Difference]: Start difference. First operand 6222 states and 13192 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:25,117 INFO L93 Difference]: Finished difference Result 7110 states and 14929 transitions. [2021-08-21 18:53:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:25,126 INFO L225 Difference]: With dead ends: 7110 [2021-08-21 18:53:25,126 INFO L226 Difference]: Without dead ends: 7102 [2021-08-21 18:53:25,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7102 states. [2021-08-21 18:53:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7102 to 6226. [2021-08-21 18:53:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 2.1230522088353414) internal successors, (13216), 6225 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 13216 transitions. [2021-08-21 18:53:25,193 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 13216 transitions. Word has length 32 [2021-08-21 18:53:25,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:25,193 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 13216 transitions. [2021-08-21 18:53:25,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 13216 transitions. [2021-08-21 18:53:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:25,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:25,201 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:25,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:25,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,417 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash 191146463, now seen corresponding path program 2 times [2021-08-21 18:53:25,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:25,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731651329] [2021-08-21 18:53:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:25,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:25,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:25,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731651329] [2021-08-21 18:53:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731651329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560581496] [2021-08-21 18:53:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:25,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:25,465 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:25,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:53:26,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:26,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:26,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:26,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560581496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:26,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:26,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:26,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174130714] [2021-08-21 18:53:26,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:26,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:26,432 INFO L87 Difference]: Start difference. First operand 6226 states and 13216 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:26,527 INFO L93 Difference]: Finished difference Result 7201 states and 15206 transitions. [2021-08-21 18:53:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:26,536 INFO L225 Difference]: With dead ends: 7201 [2021-08-21 18:53:26,536 INFO L226 Difference]: Without dead ends: 7193 [2021-08-21 18:53:26,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7193 states. [2021-08-21 18:53:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7193 to 6242. [2021-08-21 18:53:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 2.129145970197084) internal successors, (13288), 6241 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 13288 transitions. [2021-08-21 18:53:26,666 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 13288 transitions. Word has length 32 [2021-08-21 18:53:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:26,666 INFO L470 AbstractCegarLoop]: Abstraction has 6242 states and 13288 transitions. [2021-08-21 18:53:26,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 13288 transitions. [2021-08-21 18:53:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:26,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:26,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:26,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:53:26,890 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:26,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1761791645, now seen corresponding path program 2 times [2021-08-21 18:53:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:26,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586055154] [2021-08-21 18:53:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:26,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:26,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:26,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586055154] [2021-08-21 18:53:26,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586055154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:26,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319129527] [2021-08-21 18:53:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:26,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:26,939 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:26,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:53:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:27,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319129527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:27,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:27,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020968256] [2021-08-21 18:53:27,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:27,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:27,918 INFO L87 Difference]: Start difference. First operand 6242 states and 13288 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:28,009 INFO L93 Difference]: Finished difference Result 7230 states and 15299 transitions. [2021-08-21 18:53:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:28,018 INFO L225 Difference]: With dead ends: 7230 [2021-08-21 18:53:28,018 INFO L226 Difference]: Without dead ends: 7222 [2021-08-21 18:53:28,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2021-08-21 18:53:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 6262. [2021-08-21 18:53:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6262 states, 6261 states have (on average 2.13512218495448) internal successors, (13368), 6261 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6262 states to 6262 states and 13368 transitions. [2021-08-21 18:53:28,082 INFO L78 Accepts]: Start accepts. Automaton has 6262 states and 13368 transitions. Word has length 32 [2021-08-21 18:53:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:28,082 INFO L470 AbstractCegarLoop]: Abstraction has 6262 states and 13368 transitions. [2021-08-21 18:53:28,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6262 states and 13368 transitions. [2021-08-21 18:53:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:28,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:28,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:28,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:28,307 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:28,307 INFO L82 PathProgramCache]: Analyzing trace with hash 580237543, now seen corresponding path program 2 times [2021-08-21 18:53:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:28,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341808800] [2021-08-21 18:53:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:28,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:28,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:28,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341808800] [2021-08-21 18:53:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341808800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:28,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777392290] [2021-08-21 18:53:28,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:28,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:28,356 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:28,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:53:29,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:29,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777392290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469726076] [2021-08-21 18:53:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:29,375 INFO L87 Difference]: Start difference. First operand 6262 states and 13368 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:29,463 INFO L93 Difference]: Finished difference Result 7184 states and 15218 transitions. [2021-08-21 18:53:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:29,471 INFO L225 Difference]: With dead ends: 7184 [2021-08-21 18:53:29,472 INFO L226 Difference]: Without dead ends: 7176 [2021-08-21 18:53:29,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-08-21 18:53:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 6244. [2021-08-21 18:53:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6244 states, 6243 states have (on average 2.1276629825404454) internal successors, (13283), 6243 states have internal predecessors, (13283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 13283 transitions. [2021-08-21 18:53:29,540 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 13283 transitions. Word has length 32 [2021-08-21 18:53:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 6244 states and 13283 transitions. [2021-08-21 18:53:29,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 13283 transitions. [2021-08-21 18:53:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:29,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:29,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:29,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:29,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:29,766 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1234436141, now seen corresponding path program 3 times [2021-08-21 18:53:29,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:29,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134160355] [2021-08-21 18:53:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:29,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:29,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:29,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134160355] [2021-08-21 18:53:29,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134160355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591935852] [2021-08-21 18:53:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:29,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:29,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:29,814 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:53:30,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591935852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:30,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:30,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:30,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286408390] [2021-08-21 18:53:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:30,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:30,833 INFO L87 Difference]: Start difference. First operand 6244 states and 13283 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:30,925 INFO L93 Difference]: Finished difference Result 7292 states and 15336 transitions. [2021-08-21 18:53:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:30,935 INFO L225 Difference]: With dead ends: 7292 [2021-08-21 18:53:30,935 INFO L226 Difference]: Without dead ends: 7284 [2021-08-21 18:53:30,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7284 states. [2021-08-21 18:53:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7284 to 6260. [2021-08-21 18:53:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.1260584757948555) internal successors, (13307), 6259 states have internal predecessors, (13307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 13307 transitions. [2021-08-21 18:53:31,002 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 13307 transitions. Word has length 32 [2021-08-21 18:53:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:31,003 INFO L470 AbstractCegarLoop]: Abstraction has 6260 states and 13307 transitions. [2021-08-21 18:53:31,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 13307 transitions. [2021-08-21 18:53:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:31,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:31,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:31,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:31,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,228 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash -635384669, now seen corresponding path program 3 times [2021-08-21 18:53:31,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:31,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108286851] [2021-08-21 18:53:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:31,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:31,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:31,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108286851] [2021-08-21 18:53:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108286851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207260710] [2021-08-21 18:53:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:31,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:31,277 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:31,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:53:32,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:32,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:32,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207260710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:32,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:32,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:32,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149757339] [2021-08-21 18:53:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:32,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:32,331 INFO L87 Difference]: Start difference. First operand 6260 states and 13307 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:32,417 INFO L93 Difference]: Finished difference Result 7348 states and 15593 transitions. [2021-08-21 18:53:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:32,426 INFO L225 Difference]: With dead ends: 7348 [2021-08-21 18:53:32,427 INFO L226 Difference]: Without dead ends: 7340 [2021-08-21 18:53:32,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-08-21 18:53:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 6326. [2021-08-21 18:53:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6326 states, 6325 states have (on average 2.1520948616600792) internal successors, (13612), 6325 states have internal predecessors, (13612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6326 states to 6326 states and 13612 transitions. [2021-08-21 18:53:32,495 INFO L78 Accepts]: Start accepts. Automaton has 6326 states and 13612 transitions. Word has length 32 [2021-08-21 18:53:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 6326 states and 13612 transitions. [2021-08-21 18:53:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6326 states and 13612 transitions. [2021-08-21 18:53:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:32,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:32,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:32,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:32,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:32,721 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash -993511525, now seen corresponding path program 3 times [2021-08-21 18:53:32,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:32,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477597820] [2021-08-21 18:53:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:32,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:32,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:32,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477597820] [2021-08-21 18:53:32,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477597820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:32,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928860493] [2021-08-21 18:53:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:32,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:32,769 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:32,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:53:33,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:33,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928860493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:33,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:33,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:33,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877893684] [2021-08-21 18:53:33,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:33,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:33,801 INFO L87 Difference]: Start difference. First operand 6326 states and 13612 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:33,897 INFO L93 Difference]: Finished difference Result 7308 states and 15481 transitions. [2021-08-21 18:53:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:33,908 INFO L225 Difference]: With dead ends: 7308 [2021-08-21 18:53:33,908 INFO L226 Difference]: Without dead ends: 7296 [2021-08-21 18:53:33,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7296 states. [2021-08-21 18:53:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7296 to 6346. [2021-08-21 18:53:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6346 states, 6345 states have (on average 2.1572892040977147) internal successors, (13688), 6345 states have internal predecessors, (13688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6346 states to 6346 states and 13688 transitions. [2021-08-21 18:53:33,983 INFO L78 Accepts]: Start accepts. Automaton has 6346 states and 13688 transitions. Word has length 32 [2021-08-21 18:53:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:33,983 INFO L470 AbstractCegarLoop]: Abstraction has 6346 states and 13688 transitions. [2021-08-21 18:53:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6346 states and 13688 transitions. [2021-08-21 18:53:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:33,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:33,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:34,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:34,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 18:53:34,205 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1039445521, now seen corresponding path program 3 times [2021-08-21 18:53:34,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:34,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275799159] [2021-08-21 18:53:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:34,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:34,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:34,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275799159] [2021-08-21 18:53:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275799159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:34,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911493772] [2021-08-21 18:53:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:34,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:34,259 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:53:35,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:35,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911493772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:35,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:35,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773426177] [2021-08-21 18:53:35,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:35,385 INFO L87 Difference]: Start difference. First operand 6346 states and 13688 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:35,494 INFO L93 Difference]: Finished difference Result 7439 states and 15913 transitions. [2021-08-21 18:53:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:35,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:35,506 INFO L225 Difference]: With dead ends: 7439 [2021-08-21 18:53:35,506 INFO L226 Difference]: Without dead ends: 7431 [2021-08-21 18:53:35,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-08-21 18:53:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 6391. [2021-08-21 18:53:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 2.169483568075117) internal successors, (13863), 6390 states have internal predecessors, (13863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 13863 transitions. [2021-08-21 18:53:35,591 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 13863 transitions. Word has length 32 [2021-08-21 18:53:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:35,592 INFO L470 AbstractCegarLoop]: Abstraction has 6391 states and 13863 transitions. [2021-08-21 18:53:35,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 13863 transitions. [2021-08-21 18:53:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:35,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:35,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:35,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:35,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,822 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash -648723669, now seen corresponding path program 3 times [2021-08-21 18:53:35,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:35,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72437899] [2021-08-21 18:53:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:35,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:35,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:35,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72437899] [2021-08-21 18:53:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72437899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126791579] [2021-08-21 18:53:35,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:35,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:35,913 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:35,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:53:36,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126791579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:37,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:37,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:37,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283879372] [2021-08-21 18:53:37,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:37,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:37,143 INFO L87 Difference]: Start difference. First operand 6391 states and 13863 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:37,229 INFO L93 Difference]: Finished difference Result 7435 states and 15973 transitions. [2021-08-21 18:53:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:37,239 INFO L225 Difference]: With dead ends: 7435 [2021-08-21 18:53:37,239 INFO L226 Difference]: Without dead ends: 7427 [2021-08-21 18:53:37,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7427 states. [2021-08-21 18:53:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7427 to 6415. [2021-08-21 18:53:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6415 states, 6414 states have (on average 2.1771125662613033) internal successors, (13964), 6414 states have internal predecessors, (13964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6415 states to 6415 states and 13964 transitions. [2021-08-21 18:53:37,375 INFO L78 Accepts]: Start accepts. Automaton has 6415 states and 13964 transitions. Word has length 32 [2021-08-21 18:53:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 6415 states and 13964 transitions. [2021-08-21 18:53:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6415 states and 13964 transitions. [2021-08-21 18:53:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:37,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:37,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:37,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:53:37,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:37,603 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1573180459, now seen corresponding path program 3 times [2021-08-21 18:53:37,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:37,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983536987] [2021-08-21 18:53:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:37,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:37,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983536987] [2021-08-21 18:53:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983536987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364879316] [2021-08-21 18:53:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:37,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:37,653 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:37,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:53:38,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:38,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364879316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:38,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:38,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:38,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106202615] [2021-08-21 18:53:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:38,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:38,783 INFO L87 Difference]: Start difference. First operand 6415 states and 13964 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:38,880 INFO L93 Difference]: Finished difference Result 7436 states and 16051 transitions. [2021-08-21 18:53:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:38,890 INFO L225 Difference]: With dead ends: 7436 [2021-08-21 18:53:38,890 INFO L226 Difference]: Without dead ends: 7428 [2021-08-21 18:53:38,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7428 states. [2021-08-21 18:53:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7428 to 6464. [2021-08-21 18:53:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6464 states, 6463 states have (on average 2.195729537366548) internal successors, (14191), 6463 states have internal predecessors, (14191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 14191 transitions. [2021-08-21 18:53:38,964 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 14191 transitions. Word has length 32 [2021-08-21 18:53:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 6464 states and 14191 transitions. [2021-08-21 18:53:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 14191 transitions. [2021-08-21 18:53:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:38,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:38,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:38,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 18:53:39,191 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1646266847, now seen corresponding path program 4 times [2021-08-21 18:53:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:39,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572566168] [2021-08-21 18:53:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:39,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572566168] [2021-08-21 18:53:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572566168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520633545] [2021-08-21 18:53:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:39,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:39,240 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:39,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:53:40,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:40,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520633545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:40,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:40,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948629407] [2021-08-21 18:53:40,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:40,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:40,443 INFO L87 Difference]: Start difference. First operand 6464 states and 14191 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:40,534 INFO L93 Difference]: Finished difference Result 7424 states and 16195 transitions. [2021-08-21 18:53:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:40,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:40,543 INFO L225 Difference]: With dead ends: 7424 [2021-08-21 18:53:40,543 INFO L226 Difference]: Without dead ends: 7416 [2021-08-21 18:53:40,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-08-21 18:53:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6484. [2021-08-21 18:53:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6484 states, 6483 states have (on average 2.1991362023754433) internal successors, (14257), 6483 states have internal predecessors, (14257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6484 states to 6484 states and 14257 transitions. [2021-08-21 18:53:40,610 INFO L78 Accepts]: Start accepts. Automaton has 6484 states and 14257 transitions. Word has length 32 [2021-08-21 18:53:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:40,610 INFO L470 AbstractCegarLoop]: Abstraction has 6484 states and 14257 transitions. [2021-08-21 18:53:40,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6484 states and 14257 transitions. [2021-08-21 18:53:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:40,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:40,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:40,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:40,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:40,837 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash 661566563, now seen corresponding path program 5 times [2021-08-21 18:53:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:40,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982673309] [2021-08-21 18:53:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:40,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:40,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:40,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982673309] [2021-08-21 18:53:40,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982673309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037566556] [2021-08-21 18:53:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:40,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:40,898 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:40,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:53:41,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:41,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037566556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:41,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:41,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:41,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754013725] [2021-08-21 18:53:41,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:41,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:41,955 INFO L87 Difference]: Start difference. First operand 6484 states and 14257 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:42,083 INFO L93 Difference]: Finished difference Result 7404 states and 16192 transitions. [2021-08-21 18:53:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:42,092 INFO L225 Difference]: With dead ends: 7404 [2021-08-21 18:53:42,093 INFO L226 Difference]: Without dead ends: 7396 [2021-08-21 18:53:42,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2021-08-21 18:53:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 6519. [2021-08-21 18:53:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6519 states, 6518 states have (on average 2.209880331389997) internal successors, (14404), 6518 states have internal predecessors, (14404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6519 states to 6519 states and 14404 transitions. [2021-08-21 18:53:42,162 INFO L78 Accepts]: Start accepts. Automaton has 6519 states and 14404 transitions. Word has length 32 [2021-08-21 18:53:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:42,162 INFO L470 AbstractCegarLoop]: Abstraction has 6519 states and 14404 transitions. [2021-08-21 18:53:42,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6519 states and 14404 transitions. [2021-08-21 18:53:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:42,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:42,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:42,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:42,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 18:53:42,391 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -537275305, now seen corresponding path program 3 times [2021-08-21 18:53:42,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:42,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698136191] [2021-08-21 18:53:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:42,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:42,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:42,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698136191] [2021-08-21 18:53:42,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698136191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137716617] [2021-08-21 18:53:42,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:42,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:42,445 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:42,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:53:43,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:43,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:43,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137716617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:43,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:43,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:43,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568291506] [2021-08-21 18:53:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:43,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:43,665 INFO L87 Difference]: Start difference. First operand 6519 states and 14404 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:43,747 INFO L93 Difference]: Finished difference Result 7619 states and 16649 transitions. [2021-08-21 18:53:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:43,756 INFO L225 Difference]: With dead ends: 7619 [2021-08-21 18:53:43,756 INFO L226 Difference]: Without dead ends: 7611 [2021-08-21 18:53:43,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2021-08-21 18:53:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 6580. [2021-08-21 18:53:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6579 states have (on average 2.2241982064143486) internal successors, (14633), 6579 states have internal predecessors, (14633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 14633 transitions. [2021-08-21 18:53:43,826 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 14633 transitions. Word has length 32 [2021-08-21 18:53:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:43,826 INFO L470 AbstractCegarLoop]: Abstraction has 6580 states and 14633 transitions. [2021-08-21 18:53:43,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 14633 transitions. [2021-08-21 18:53:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:43,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:43,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:43,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:44,050 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 61776167, now seen corresponding path program 6 times [2021-08-21 18:53:44,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:44,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792404301] [2021-08-21 18:53:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:44,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:44,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:44,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792404301] [2021-08-21 18:53:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792404301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:44,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093012901] [2021-08-21 18:53:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:44,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:44,098 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:44,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:53:45,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:45,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:45,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:45,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093012901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:45,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:45,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018371762] [2021-08-21 18:53:45,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:45,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:45,356 INFO L87 Difference]: Start difference. First operand 6580 states and 14633 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:45,445 INFO L93 Difference]: Finished difference Result 7679 states and 16902 transitions. [2021-08-21 18:53:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:45,455 INFO L225 Difference]: With dead ends: 7679 [2021-08-21 18:53:45,455 INFO L226 Difference]: Without dead ends: 7671 [2021-08-21 18:53:45,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-08-21 18:53:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6626. [2021-08-21 18:53:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 2.2375849056603774) internal successors, (14824), 6625 states have internal predecessors, (14824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 14824 transitions. [2021-08-21 18:53:45,531 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 14824 transitions. Word has length 32 [2021-08-21 18:53:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:45,531 INFO L470 AbstractCegarLoop]: Abstraction has 6626 states and 14824 transitions. [2021-08-21 18:53:45,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 14824 transitions. [2021-08-21 18:53:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:45,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:45,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:45,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:45,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:45,758 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:45,759 INFO L82 PathProgramCache]: Analyzing trace with hash -296350689, now seen corresponding path program 3 times [2021-08-21 18:53:45,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:45,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890023567] [2021-08-21 18:53:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:45,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:45,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:45,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890023567] [2021-08-21 18:53:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890023567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:45,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002748647] [2021-08-21 18:53:45,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:45,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:45,807 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:45,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:53:46,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002748647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:47,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:47,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:47,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664086135] [2021-08-21 18:53:47,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:47,024 INFO L87 Difference]: Start difference. First operand 6626 states and 14824 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:47,104 INFO L93 Difference]: Finished difference Result 7627 states and 16756 transitions. [2021-08-21 18:53:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:47,114 INFO L225 Difference]: With dead ends: 7627 [2021-08-21 18:53:47,114 INFO L226 Difference]: Without dead ends: 7615 [2021-08-21 18:53:47,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7615 states. [2021-08-21 18:53:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7615 to 6646. [2021-08-21 18:53:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6646 states, 6645 states have (on average 2.2416854778028594) internal successors, (14896), 6645 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 14896 transitions. [2021-08-21 18:53:47,187 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 14896 transitions. Word has length 32 [2021-08-21 18:53:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:47,188 INFO L470 AbstractCegarLoop]: Abstraction has 6646 states and 14896 transitions. [2021-08-21 18:53:47,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 14896 transitions. [2021-08-21 18:53:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:47,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:47,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:47,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:47,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:47,410 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash -342284685, now seen corresponding path program 3 times [2021-08-21 18:53:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:47,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188107859] [2021-08-21 18:53:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:47,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:47,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:47,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188107859] [2021-08-21 18:53:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188107859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:47,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671797711] [2021-08-21 18:53:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:47,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:47,460 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:47,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:53:48,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:48,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:48,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671797711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:48,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:48,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760158903] [2021-08-21 18:53:48,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:48,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:48,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:48,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:48,729 INFO L87 Difference]: Start difference. First operand 6646 states and 14896 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:48,811 INFO L93 Difference]: Finished difference Result 7778 states and 17221 transitions. [2021-08-21 18:53:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:48,821 INFO L225 Difference]: With dead ends: 7778 [2021-08-21 18:53:48,822 INFO L226 Difference]: Without dead ends: 7770 [2021-08-21 18:53:48,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7770 states. [2021-08-21 18:53:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7770 to 6700. [2021-08-21 18:53:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 2.250335871025526) internal successors, (15075), 6699 states have internal predecessors, (15075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 15075 transitions. [2021-08-21 18:53:48,896 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 15075 transitions. Word has length 32 [2021-08-21 18:53:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 15075 transitions. [2021-08-21 18:53:48,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 15075 transitions. [2021-08-21 18:53:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:48,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:48,904 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:48,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:49,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:49,123 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash 48437167, now seen corresponding path program 3 times [2021-08-21 18:53:49,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:49,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863763032] [2021-08-21 18:53:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:49,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:49,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:49,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863763032] [2021-08-21 18:53:49,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863763032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:49,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573556999] [2021-08-21 18:53:49,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:49,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:49,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:49,174 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:49,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:53:50,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:50,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:50,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:50,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573556999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:50,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:50,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410694895] [2021-08-21 18:53:50,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:50,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,525 INFO L87 Difference]: Start difference. First operand 6700 states and 15075 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,614 INFO L93 Difference]: Finished difference Result 7767 states and 17260 transitions. [2021-08-21 18:53:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,626 INFO L225 Difference]: With dead ends: 7767 [2021-08-21 18:53:50,626 INFO L226 Difference]: Without dead ends: 7759 [2021-08-21 18:53:50,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2021-08-21 18:53:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 6724. [2021-08-21 18:53:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.2564331399672763) internal successors, (15170), 6723 states have internal predecessors, (15170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 15170 transitions. [2021-08-21 18:53:50,712 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 15170 transitions. Word has length 32 [2021-08-21 18:53:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:50,713 INFO L470 AbstractCegarLoop]: Abstraction has 6724 states and 15170 transitions. [2021-08-21 18:53:50,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 15170 transitions. [2021-08-21 18:53:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:50,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:50,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:50,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:50,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-21 18:53:50,938 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2024626001, now seen corresponding path program 3 times [2021-08-21 18:53:50,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:50,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231493984] [2021-08-21 18:53:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:50,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:51,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:51,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231493984] [2021-08-21 18:53:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231493984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:51,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773682020] [2021-08-21 18:53:51,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:51,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:51,021 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:51,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:53:52,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:52,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:52,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773682020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:52,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:52,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:52,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861729783] [2021-08-21 18:53:52,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:52,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:52,462 INFO L87 Difference]: Start difference. First operand 6724 states and 15170 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:52,580 INFO L93 Difference]: Finished difference Result 7786 states and 17367 transitions. [2021-08-21 18:53:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:52,594 INFO L225 Difference]: With dead ends: 7786 [2021-08-21 18:53:52,594 INFO L226 Difference]: Without dead ends: 7778 [2021-08-21 18:53:52,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7778 states. [2021-08-21 18:53:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7778 to 6784. [2021-08-21 18:53:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6784 states, 6783 states have (on average 2.270529264337314) internal successors, (15401), 6783 states have internal predecessors, (15401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6784 states to 6784 states and 15401 transitions. [2021-08-21 18:53:52,690 INFO L78 Accepts]: Start accepts. Automaton has 6784 states and 15401 transitions. Word has length 32 [2021-08-21 18:53:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:52,691 INFO L470 AbstractCegarLoop]: Abstraction has 6784 states and 15401 transitions. [2021-08-21 18:53:52,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6784 states and 15401 transitions. [2021-08-21 18:53:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:52,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:52,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:52,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 18:53:52,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:52,906 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1980242847, now seen corresponding path program 3 times [2021-08-21 18:53:52,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:52,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5993522] [2021-08-21 18:53:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:52,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:52,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5993522] [2021-08-21 18:53:52,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5993522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137916224] [2021-08-21 18:53:52,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:52,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:52,984 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:52,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:53:54,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:54,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:54,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137916224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:54,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:54,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339199353] [2021-08-21 18:53:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,359 INFO L87 Difference]: Start difference. First operand 6784 states and 15401 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:54,486 INFO L93 Difference]: Finished difference Result 7834 states and 17461 transitions. [2021-08-21 18:53:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:54,498 INFO L225 Difference]: With dead ends: 7834 [2021-08-21 18:53:54,499 INFO L226 Difference]: Without dead ends: 7826 [2021-08-21 18:53:54,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-08-21 18:53:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6800. [2021-08-21 18:53:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 2.268715987645242) internal successors, (15425), 6799 states have internal predecessors, (15425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 15425 transitions. [2021-08-21 18:53:54,576 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 15425 transitions. Word has length 32 [2021-08-21 18:53:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:54,576 INFO L470 AbstractCegarLoop]: Abstraction has 6800 states and 15425 transitions. [2021-08-21 18:53:54,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 15425 transitions. [2021-08-21 18:53:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:54,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:54,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:54,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:54,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 18:53:54,804 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:54,804 INFO L82 PathProgramCache]: Analyzing trace with hash 673236119, now seen corresponding path program 4 times [2021-08-21 18:53:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:54,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576223425] [2021-08-21 18:53:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:54,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:54,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:54,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576223425] [2021-08-21 18:53:54,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576223425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886995878] [2021-08-21 18:53:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:54,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:54,854 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:54,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:53:56,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:56,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886995878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:56,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:56,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851657949] [2021-08-21 18:53:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:56,246 INFO L87 Difference]: Start difference. First operand 6800 states and 15425 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:56,332 INFO L93 Difference]: Finished difference Result 7886 states and 17680 transitions. [2021-08-21 18:53:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:56,345 INFO L225 Difference]: With dead ends: 7886 [2021-08-21 18:53:56,345 INFO L226 Difference]: Without dead ends: 7878 [2021-08-21 18:53:56,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-08-21 18:53:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6857. [2021-08-21 18:53:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6857 states, 6856 states have (on average 2.2845682613768963) internal successors, (15663), 6856 states have internal predecessors, (15663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6857 states to 6857 states and 15663 transitions. [2021-08-21 18:53:56,441 INFO L78 Accepts]: Start accepts. Automaton has 6857 states and 15663 transitions. Word has length 32 [2021-08-21 18:53:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:56,442 INFO L470 AbstractCegarLoop]: Abstraction has 6857 states and 15663 transitions. [2021-08-21 18:53:56,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6857 states and 15663 transitions. [2021-08-21 18:53:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:56,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:56,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:56,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:56,665 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 315109263, now seen corresponding path program 3 times [2021-08-21 18:53:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:56,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352706761] [2021-08-21 18:53:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:56,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:56,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:56,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352706761] [2021-08-21 18:53:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352706761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460540971] [2021-08-21 18:53:56,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:56,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:56,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:56,719 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:56,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:53:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:58,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460540971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:58,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796672665] [2021-08-21 18:53:58,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:58,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,069 INFO L87 Difference]: Start difference. First operand 6857 states and 15663 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:58,147 INFO L93 Difference]: Finished difference Result 7837 states and 17537 transitions. [2021-08-21 18:53:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:53:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:58,214 INFO L225 Difference]: With dead ends: 7837 [2021-08-21 18:53:58,214 INFO L226 Difference]: Without dead ends: 7825 [2021-08-21 18:53:58,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-08-21 18:53:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 6877. [2021-08-21 18:53:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 2.2872309482257127) internal successors, (15727), 6876 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 15727 transitions. [2021-08-21 18:53:58,289 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 15727 transitions. Word has length 32 [2021-08-21 18:53:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:58,289 INFO L470 AbstractCegarLoop]: Abstraction has 6877 states and 15727 transitions. [2021-08-21 18:53:58,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 15727 transitions. [2021-08-21 18:53:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:58,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:58,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:58,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:58,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:58,518 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:53:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash 269175267, now seen corresponding path program 4 times [2021-08-21 18:53:58,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:58,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45187281] [2021-08-21 18:53:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:58,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:58,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:58,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45187281] [2021-08-21 18:53:58,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45187281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:58,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955725432] [2021-08-21 18:53:58,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:58,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:58,574 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:58,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:53:59,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:59,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955725432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:59,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:59,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:59,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214296623] [2021-08-21 18:53:59,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:59,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:59,929 INFO L87 Difference]: Start difference. First operand 6877 states and 15727 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:00,011 INFO L93 Difference]: Finished difference Result 7967 states and 17946 transitions. [2021-08-21 18:54:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:00,024 INFO L225 Difference]: With dead ends: 7967 [2021-08-21 18:54:00,024 INFO L226 Difference]: Without dead ends: 7959 [2021-08-21 18:54:00,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2021-08-21 18:54:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 6913. [2021-08-21 18:54:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 2.294704861111111) internal successors, (15861), 6912 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 15861 transitions. [2021-08-21 18:54:00,103 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 15861 transitions. Word has length 32 [2021-08-21 18:54:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:00,103 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 15861 transitions. [2021-08-21 18:54:00,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 15861 transitions. [2021-08-21 18:54:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:00,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:00,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:00,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:00,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,332 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 659897119, now seen corresponding path program 3 times [2021-08-21 18:54:00,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:00,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420123695] [2021-08-21 18:54:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:00,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:00,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:00,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420123695] [2021-08-21 18:54:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420123695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536945096] [2021-08-21 18:54:00,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:00,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:00,383 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:00,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:54:01,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:01,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:01,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:01,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536945096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:01,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:01,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:01,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595840524] [2021-08-21 18:54:01,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:01,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:01,662 INFO L87 Difference]: Start difference. First operand 6913 states and 15861 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:01,744 INFO L93 Difference]: Finished difference Result 7957 states and 17977 transitions. [2021-08-21 18:54:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:01,756 INFO L225 Difference]: With dead ends: 7957 [2021-08-21 18:54:01,756 INFO L226 Difference]: Without dead ends: 7949 [2021-08-21 18:54:01,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2021-08-21 18:54:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 6937. [2021-08-21 18:54:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6937 states, 6936 states have (on average 2.298731257208766) internal successors, (15944), 6936 states have internal predecessors, (15944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 15944 transitions. [2021-08-21 18:54:01,837 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 15944 transitions. Word has length 32 [2021-08-21 18:54:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 6937 states and 15944 transitions. [2021-08-21 18:54:01,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 15944 transitions. [2021-08-21 18:54:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:01,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:01,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:01,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:02,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:02,065 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1413166049, now seen corresponding path program 3 times [2021-08-21 18:54:02,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:02,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214616081] [2021-08-21 18:54:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:02,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:02,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:02,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214616081] [2021-08-21 18:54:02,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214616081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:02,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993076282] [2021-08-21 18:54:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:02,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:02,129 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:02,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:54:03,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:03,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993076282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:03,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:03,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842077067] [2021-08-21 18:54:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:03,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:03,575 INFO L87 Difference]: Start difference. First operand 6937 states and 15944 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:03,664 INFO L93 Difference]: Finished difference Result 7953 states and 18019 transitions. [2021-08-21 18:54:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:03,675 INFO L225 Difference]: With dead ends: 7953 [2021-08-21 18:54:03,675 INFO L226 Difference]: Without dead ends: 7945 [2021-08-21 18:54:03,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-08-21 18:54:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6975. [2021-08-21 18:54:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6975 states, 6974 states have (on average 2.3085747060510466) internal successors, (16100), 6974 states have internal predecessors, (16100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6975 states to 6975 states and 16100 transitions. [2021-08-21 18:54:03,755 INFO L78 Accepts]: Start accepts. Automaton has 6975 states and 16100 transitions. Word has length 32 [2021-08-21 18:54:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 6975 states and 16100 transitions. [2021-08-21 18:54:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 6975 states and 16100 transitions. [2021-08-21 18:54:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:03,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:03,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:03,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:03,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 18:54:03,984 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash -448645033, now seen corresponding path program 5 times [2021-08-21 18:54:03,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:03,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047818552] [2021-08-21 18:54:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:03,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:04,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:04,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047818552] [2021-08-21 18:54:04,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047818552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:04,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582409320] [2021-08-21 18:54:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:04,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:04,049 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:04,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:54:05,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582409320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:05,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:05,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:05,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788459769] [2021-08-21 18:54:05,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:05,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:05,476 INFO L87 Difference]: Start difference. First operand 6975 states and 16100 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:05,621 INFO L93 Difference]: Finished difference Result 7971 states and 18206 transitions. [2021-08-21 18:54:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:05,632 INFO L225 Difference]: With dead ends: 7971 [2021-08-21 18:54:05,633 INFO L226 Difference]: Without dead ends: 7963 [2021-08-21 18:54:05,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2021-08-21 18:54:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 7011. [2021-08-21 18:54:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7011 states, 7010 states have (on average 2.314978601997147) internal successors, (16228), 7010 states have internal predecessors, (16228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7011 states to 7011 states and 16228 transitions. [2021-08-21 18:54:05,713 INFO L78 Accepts]: Start accepts. Automaton has 7011 states and 16228 transitions. Word has length 32 [2021-08-21 18:54:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 7011 states and 16228 transitions. [2021-08-21 18:54:05,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7011 states and 16228 transitions. [2021-08-21 18:54:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:05,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:05,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:05,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:05,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 18:54:05,941 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -321458469, now seen corresponding path program 5 times [2021-08-21 18:54:05,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:05,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845913907] [2021-08-21 18:54:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:05,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:05,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845913907] [2021-08-21 18:54:05,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845913907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:05,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144010797] [2021-08-21 18:54:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:05,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:05,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:05,990 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:05,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:54:07,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:07,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:07,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:07,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144010797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:07,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:07,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563484841] [2021-08-21 18:54:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:07,490 INFO L87 Difference]: Start difference. First operand 7011 states and 16228 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:07,571 INFO L93 Difference]: Finished difference Result 8026 states and 18374 transitions. [2021-08-21 18:54:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:07,583 INFO L225 Difference]: With dead ends: 8026 [2021-08-21 18:54:07,584 INFO L226 Difference]: Without dead ends: 8018 [2021-08-21 18:54:07,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8018 states. [2021-08-21 18:54:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8018 to 7047. [2021-08-21 18:54:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.320181663355095) internal successors, (16348), 7046 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 16348 transitions. [2021-08-21 18:54:07,672 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 16348 transitions. Word has length 32 [2021-08-21 18:54:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:07,673 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 16348 transitions. [2021-08-21 18:54:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 16348 transitions. [2021-08-21 18:54:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:07,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:07,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:07,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:07,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 18:54:07,902 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:07,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2061530843, now seen corresponding path program 6 times [2021-08-21 18:54:07,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:07,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643370856] [2021-08-21 18:54:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:07,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:07,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:07,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643370856] [2021-08-21 18:54:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643370856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:07,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808283841] [2021-08-21 18:54:07,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:07,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:07,959 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:07,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:54:09,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:09,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:09,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808283841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:09,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:09,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140278757] [2021-08-21 18:54:09,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:09,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:09,452 INFO L87 Difference]: Start difference. First operand 7047 states and 16348 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:09,537 INFO L93 Difference]: Finished difference Result 7977 states and 18286 transitions. [2021-08-21 18:54:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:09,547 INFO L225 Difference]: With dead ends: 7977 [2021-08-21 18:54:09,548 INFO L226 Difference]: Without dead ends: 7969 [2021-08-21 18:54:09,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2021-08-21 18:54:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 7075. [2021-08-21 18:54:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 7074 states have (on average 2.3273960983884647) internal successors, (16464), 7074 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 16464 transitions. [2021-08-21 18:54:09,626 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 16464 transitions. Word has length 32 [2021-08-21 18:54:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:09,626 INFO L470 AbstractCegarLoop]: Abstraction has 7075 states and 16464 transitions. [2021-08-21 18:54:09,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 16464 transitions. [2021-08-21 18:54:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:09,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:09,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:09,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:09,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,849 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash -900293025, now seen corresponding path program 6 times [2021-08-21 18:54:09,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:09,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833035356] [2021-08-21 18:54:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:09,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:09,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:09,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833035356] [2021-08-21 18:54:09,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833035356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173191306] [2021-08-21 18:54:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:09,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:09,903 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:09,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:54:11,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:11,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:11,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173191306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:11,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:11,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:11,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155627725] [2021-08-21 18:54:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:11,419 INFO L87 Difference]: Start difference. First operand 7075 states and 16464 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:11,502 INFO L93 Difference]: Finished difference Result 8012 states and 18413 transitions. [2021-08-21 18:54:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:11,513 INFO L225 Difference]: With dead ends: 8012 [2021-08-21 18:54:11,513 INFO L226 Difference]: Without dead ends: 8004 [2021-08-21 18:54:11,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2021-08-21 18:54:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 7103. [2021-08-21 18:54:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 2.3334272036046184) internal successors, (16572), 7102 states have internal predecessors, (16572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 16572 transitions. [2021-08-21 18:54:11,595 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 16572 transitions. Word has length 32 [2021-08-21 18:54:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:11,595 INFO L470 AbstractCegarLoop]: Abstraction has 7103 states and 16572 transitions. [2021-08-21 18:54:11,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 16572 transitions. [2021-08-21 18:54:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:11,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:11,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:11,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:11,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:11,824 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1092344651, now seen corresponding path program 4 times [2021-08-21 18:54:11,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:11,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519072904] [2021-08-21 18:54:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:11,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:11,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:11,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519072904] [2021-08-21 18:54:11,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519072904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:11,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402789432] [2021-08-21 18:54:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:11,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:11,871 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:11,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:54:13,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:13,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402789432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:13,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:13,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:13,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633192577] [2021-08-21 18:54:13,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:13,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:13,450 INFO L87 Difference]: Start difference. First operand 7103 states and 16572 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:13,531 INFO L93 Difference]: Finished difference Result 8132 states and 18605 transitions. [2021-08-21 18:54:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:13,543 INFO L225 Difference]: With dead ends: 8132 [2021-08-21 18:54:13,543 INFO L226 Difference]: Without dead ends: 8124 [2021-08-21 18:54:13,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8124 states. [2021-08-21 18:54:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8124 to 7115. [2021-08-21 18:54:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 2.332302502108518) internal successors, (16592), 7114 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 16592 transitions. [2021-08-21 18:54:13,630 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 16592 transitions. Word has length 32 [2021-08-21 18:54:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:13,630 INFO L470 AbstractCegarLoop]: Abstraction has 7115 states and 16592 transitions. [2021-08-21 18:54:13,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 16592 transitions. [2021-08-21 18:54:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:13,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:13,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:13,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:13,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 18:54:13,858 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1212777269, now seen corresponding path program 3 times [2021-08-21 18:54:13,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:13,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342030926] [2021-08-21 18:54:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:13,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:13,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:13,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342030926] [2021-08-21 18:54:13,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342030926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:13,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537714454] [2021-08-21 18:54:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:13,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:13,908 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:13,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:54:15,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:15,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:15,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537714454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:15,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:15,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899312753] [2021-08-21 18:54:15,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:15,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:15,438 INFO L87 Difference]: Start difference. First operand 7115 states and 16592 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:15,566 INFO L93 Difference]: Finished difference Result 8382 states and 19344 transitions. [2021-08-21 18:54:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:15,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:15,579 INFO L225 Difference]: With dead ends: 8382 [2021-08-21 18:54:15,579 INFO L226 Difference]: Without dead ends: 8374 [2021-08-21 18:54:15,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2021-08-21 18:54:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 7250. [2021-08-21 18:54:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7250 states, 7249 states have (on average 2.353841909228859) internal successors, (17063), 7249 states have internal predecessors, (17063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7250 states to 7250 states and 17063 transitions. [2021-08-21 18:54:15,676 INFO L78 Accepts]: Start accepts. Automaton has 7250 states and 17063 transitions. Word has length 32 [2021-08-21 18:54:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 7250 states and 17063 transitions. [2021-08-21 18:54:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 7250 states and 17063 transitions. [2021-08-21 18:54:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:15,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:15,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:15,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:15,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 18:54:15,906 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1123256907, now seen corresponding path program 1 times [2021-08-21 18:54:15,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:15,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081836113] [2021-08-21 18:54:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:15,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:15,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:15,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081836113] [2021-08-21 18:54:15,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081836113] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:15,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:15,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:15,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921299685] [2021-08-21 18:54:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:15,955 INFO L87 Difference]: Start difference. First operand 7250 states and 17063 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,033 INFO L93 Difference]: Finished difference Result 8544 states and 19663 transitions. [2021-08-21 18:54:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,047 INFO L225 Difference]: With dead ends: 8544 [2021-08-21 18:54:16,047 INFO L226 Difference]: Without dead ends: 8532 [2021-08-21 18:54:16,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8532 states. [2021-08-21 18:54:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8532 to 7341. [2021-08-21 18:54:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7341 states, 7340 states have (on average 2.3564032697547685) internal successors, (17296), 7340 states have internal predecessors, (17296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7341 states to 7341 states and 17296 transitions. [2021-08-21 18:54:16,152 INFO L78 Accepts]: Start accepts. Automaton has 7341 states and 17296 transitions. Word has length 32 [2021-08-21 18:54:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,152 INFO L470 AbstractCegarLoop]: Abstraction has 7341 states and 17296 transitions. [2021-08-21 18:54:16,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7341 states and 17296 transitions. [2021-08-21 18:54:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:16,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,162 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-21 18:54:16,162 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1077322911, now seen corresponding path program 1 times [2021-08-21 18:54:16,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547280339] [2021-08-21 18:54:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:16,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547280339] [2021-08-21 18:54:16,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547280339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:16,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:16,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:16,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791139759] [2021-08-21 18:54:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:16,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,212 INFO L87 Difference]: Start difference. First operand 7341 states and 17296 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,294 INFO L93 Difference]: Finished difference Result 8793 states and 20440 transitions. [2021-08-21 18:54:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,310 INFO L225 Difference]: With dead ends: 8793 [2021-08-21 18:54:16,310 INFO L226 Difference]: Without dead ends: 8785 [2021-08-21 18:54:16,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-08-21 18:54:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 7503. [2021-08-21 18:54:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 7502 states have (on average 2.372833910957078) internal successors, (17801), 7502 states have internal predecessors, (17801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 17801 transitions. [2021-08-21 18:54:16,414 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 17801 transitions. Word has length 32 [2021-08-21 18:54:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,415 INFO L470 AbstractCegarLoop]: Abstraction has 7503 states and 17801 transitions. [2021-08-21 18:54:16,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 17801 transitions. [2021-08-21 18:54:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:16,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-21 18:54:16,426 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1468044763, now seen corresponding path program 1 times [2021-08-21 18:54:16,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107117026] [2021-08-21 18:54:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:16,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107117026] [2021-08-21 18:54:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107117026] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:16,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:16,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:16,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700486724] [2021-08-21 18:54:16,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:16,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,474 INFO L87 Difference]: Start difference. First operand 7503 states and 17801 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,556 INFO L93 Difference]: Finished difference Result 8882 states and 20736 transitions. [2021-08-21 18:54:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,571 INFO L225 Difference]: With dead ends: 8882 [2021-08-21 18:54:16,571 INFO L226 Difference]: Without dead ends: 8874 [2021-08-21 18:54:16,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8874 states. [2021-08-21 18:54:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8874 to 7618. [2021-08-21 18:54:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7618 states, 7617 states have (on average 2.383615596691611) internal successors, (18156), 7617 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 18156 transitions. [2021-08-21 18:54:16,675 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 18156 transitions. Word has length 32 [2021-08-21 18:54:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,675 INFO L470 AbstractCegarLoop]: Abstraction has 7618 states and 18156 transitions. [2021-08-21 18:54:16,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 18156 transitions. [2021-08-21 18:54:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:16,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-21 18:54:16,686 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -605018405, now seen corresponding path program 1 times [2021-08-21 18:54:16,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899440422] [2021-08-21 18:54:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:16,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899440422] [2021-08-21 18:54:16,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899440422] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:16,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:16,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:16,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91743165] [2021-08-21 18:54:16,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:16,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,735 INFO L87 Difference]: Start difference. First operand 7618 states and 18156 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,828 INFO L93 Difference]: Finished difference Result 9011 states and 21190 transitions. [2021-08-21 18:54:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,844 INFO L225 Difference]: With dead ends: 9011 [2021-08-21 18:54:16,844 INFO L226 Difference]: Without dead ends: 9003 [2021-08-21 18:54:16,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2021-08-21 18:54:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 7745. [2021-08-21 18:54:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 7744 states have (on average 2.4076704545454546) internal successors, (18645), 7744 states have internal predecessors, (18645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 18645 transitions. [2021-08-21 18:54:16,954 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 18645 transitions. Word has length 32 [2021-08-21 18:54:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,954 INFO L470 AbstractCegarLoop]: Abstraction has 7745 states and 18645 transitions. [2021-08-21 18:54:16,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 18645 transitions. [2021-08-21 18:54:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:16,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-21 18:54:16,966 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash -389698861, now seen corresponding path program 2 times [2021-08-21 18:54:16,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775424394] [2021-08-21 18:54:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:17,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:17,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775424394] [2021-08-21 18:54:17,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775424394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:17,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841988810] [2021-08-21 18:54:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:17,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:17,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:17,056 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:17,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:54:18,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:18,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:18,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841988810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:18,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:18,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139470054] [2021-08-21 18:54:18,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:18,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:18,526 INFO L87 Difference]: Start difference. First operand 7745 states and 18645 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:18,610 INFO L93 Difference]: Finished difference Result 9017 states and 21311 transitions. [2021-08-21 18:54:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:18,623 INFO L225 Difference]: With dead ends: 9017 [2021-08-21 18:54:18,623 INFO L226 Difference]: Without dead ends: 9009 [2021-08-21 18:54:18,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9009 states. [2021-08-21 18:54:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9009 to 7815. [2021-08-21 18:54:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7815 states, 7814 states have (on average 2.417199897619657) internal successors, (18888), 7814 states have internal predecessors, (18888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 18888 transitions. [2021-08-21 18:54:18,719 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 18888 transitions. Word has length 32 [2021-08-21 18:54:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:18,719 INFO L470 AbstractCegarLoop]: Abstraction has 7815 states and 18888 transitions. [2021-08-21 18:54:18,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 18888 transitions. [2021-08-21 18:54:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:18,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:18,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:18,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:18,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,945 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -801238065, now seen corresponding path program 2 times [2021-08-21 18:54:18,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:18,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654646644] [2021-08-21 18:54:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:18,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:19,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:19,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654646644] [2021-08-21 18:54:19,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654646644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:19,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711868719] [2021-08-21 18:54:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:19,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:19,013 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:54:20,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:20,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711868719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:20,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:20,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:20,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549222122] [2021-08-21 18:54:20,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:20,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:20,652 INFO L87 Difference]: Start difference. First operand 7815 states and 18888 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:20,734 INFO L93 Difference]: Finished difference Result 9026 states and 21416 transitions. [2021-08-21 18:54:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:20,746 INFO L225 Difference]: With dead ends: 9026 [2021-08-21 18:54:20,746 INFO L226 Difference]: Without dead ends: 9018 [2021-08-21 18:54:20,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9018 states. [2021-08-21 18:54:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9018 to 7866. [2021-08-21 18:54:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7866 states, 7865 states have (on average 2.424666242848061) internal successors, (19070), 7865 states have internal predecessors, (19070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7866 states to 7866 states and 19070 transitions. [2021-08-21 18:54:20,842 INFO L78 Accepts]: Start accepts. Automaton has 7866 states and 19070 transitions. Word has length 32 [2021-08-21 18:54:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 7866 states and 19070 transitions. [2021-08-21 18:54:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7866 states and 19070 transitions. [2021-08-21 18:54:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:20,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:20,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:20,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:21,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 18:54:21,074 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1937791165, now seen corresponding path program 4 times [2021-08-21 18:54:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:21,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135627643] [2021-08-21 18:54:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:21,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:21,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:21,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135627643] [2021-08-21 18:54:21,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135627643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:21,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870610718] [2021-08-21 18:54:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:21,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:21,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:21,141 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:21,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:54:22,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:22,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870610718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:22,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:22,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:22,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966036980] [2021-08-21 18:54:22,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:22,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:22,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:22,866 INFO L87 Difference]: Start difference. First operand 7866 states and 19070 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:22,945 INFO L93 Difference]: Finished difference Result 8983 states and 21302 transitions. [2021-08-21 18:54:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:22,958 INFO L225 Difference]: With dead ends: 8983 [2021-08-21 18:54:22,958 INFO L226 Difference]: Without dead ends: 8975 [2021-08-21 18:54:22,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-08-21 18:54:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 7874. [2021-08-21 18:54:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7873 states have (on average 2.42423472627969) internal successors, (19086), 7873 states have internal predecessors, (19086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 19086 transitions. [2021-08-21 18:54:23,048 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 19086 transitions. Word has length 32 [2021-08-21 18:54:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:23,048 INFO L470 AbstractCegarLoop]: Abstraction has 7874 states and 19086 transitions. [2021-08-21 18:54:23,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 19086 transitions. [2021-08-21 18:54:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:23,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:23,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:23,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:23,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:54:23,277 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 485314655, now seen corresponding path program 2 times [2021-08-21 18:54:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:23,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295813703] [2021-08-21 18:54:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:23,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:23,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:23,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295813703] [2021-08-21 18:54:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295813703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:23,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142627498] [2021-08-21 18:54:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:23,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:23,326 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:54:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:25,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142627498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:25,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:25,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:25,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700517340] [2021-08-21 18:54:25,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:25,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:25,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,024 INFO L87 Difference]: Start difference. First operand 7874 states and 19086 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:25,103 INFO L93 Difference]: Finished difference Result 9028 states and 21436 transitions. [2021-08-21 18:54:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:25,118 INFO L225 Difference]: With dead ends: 9028 [2021-08-21 18:54:25,118 INFO L226 Difference]: Without dead ends: 9020 [2021-08-21 18:54:25,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-08-21 18:54:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 7908. [2021-08-21 18:54:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7908 states, 7907 states have (on average 2.4269634501074995) internal successors, (19190), 7907 states have internal predecessors, (19190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 19190 transitions. [2021-08-21 18:54:25,231 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 19190 transitions. Word has length 32 [2021-08-21 18:54:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 7908 states and 19190 transitions. [2021-08-21 18:54:25,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 19190 transitions. [2021-08-21 18:54:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:25,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:25,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:25,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:25,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 18:54:25,457 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash 818919079, now seen corresponding path program 1 times [2021-08-21 18:54:25,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245619051] [2021-08-21 18:54:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:25,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245619051] [2021-08-21 18:54:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245619051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:25,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:25,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:25,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452347465] [2021-08-21 18:54:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,505 INFO L87 Difference]: Start difference. First operand 7908 states and 19190 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:25,580 INFO L93 Difference]: Finished difference Result 9250 states and 21878 transitions. [2021-08-21 18:54:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:25,593 INFO L225 Difference]: With dead ends: 9250 [2021-08-21 18:54:25,594 INFO L226 Difference]: Without dead ends: 9238 [2021-08-21 18:54:25,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9238 states. [2021-08-21 18:54:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9238 to 8007. [2021-08-21 18:54:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8007 states, 8006 states have (on average 2.426305271046715) internal successors, (19425), 8006 states have internal predecessors, (19425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 19425 transitions. [2021-08-21 18:54:25,692 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 19425 transitions. Word has length 32 [2021-08-21 18:54:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 8007 states and 19425 transitions. [2021-08-21 18:54:25,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 19425 transitions. [2021-08-21 18:54:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:25,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:25,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-08-21 18:54:25,703 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1209640931, now seen corresponding path program 1 times [2021-08-21 18:54:25,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105007923] [2021-08-21 18:54:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:25,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:25,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105007923] [2021-08-21 18:54:25,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105007923] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:25,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:25,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:25,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118589168] [2021-08-21 18:54:25,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:25,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,751 INFO L87 Difference]: Start difference. First operand 8007 states and 19425 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:25,823 INFO L93 Difference]: Finished difference Result 9303 states and 21977 transitions. [2021-08-21 18:54:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:25,837 INFO L225 Difference]: With dead ends: 9303 [2021-08-21 18:54:25,837 INFO L226 Difference]: Without dead ends: 9291 [2021-08-21 18:54:25,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9291 states. [2021-08-21 18:54:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9291 to 8114. [2021-08-21 18:54:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8114 states, 8113 states have (on average 2.422161962282756) internal successors, (19651), 8113 states have internal predecessors, (19651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8114 states to 8114 states and 19651 transitions. [2021-08-21 18:54:25,943 INFO L78 Accepts]: Start accepts. Automaton has 8114 states and 19651 transitions. Word has length 32 [2021-08-21 18:54:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:25,943 INFO L470 AbstractCegarLoop]: Abstraction has 8114 states and 19651 transitions. [2021-08-21 18:54:25,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8114 states and 19651 transitions. [2021-08-21 18:54:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:25,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:25,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:25,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-21 18:54:25,955 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1876696655, now seen corresponding path program 3 times [2021-08-21 18:54:25,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805538482] [2021-08-21 18:54:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:26,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:26,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805538482] [2021-08-21 18:54:26,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805538482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:26,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373900572] [2021-08-21 18:54:26,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:26,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:26,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:26,006 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:26,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:54:27,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373900572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:27,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:27,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:27,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570619507] [2021-08-21 18:54:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:27,700 INFO L87 Difference]: Start difference. First operand 8114 states and 19651 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:27,779 INFO L93 Difference]: Finished difference Result 9387 states and 22219 transitions. [2021-08-21 18:54:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:27,794 INFO L225 Difference]: With dead ends: 9387 [2021-08-21 18:54:27,794 INFO L226 Difference]: Without dead ends: 9379 [2021-08-21 18:54:27,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2021-08-21 18:54:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 8195. [2021-08-21 18:54:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8195 states, 8194 states have (on average 2.4260434464242127) internal successors, (19879), 8194 states have internal predecessors, (19879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8195 states to 8195 states and 19879 transitions. [2021-08-21 18:54:27,895 INFO L78 Accepts]: Start accepts. Automaton has 8195 states and 19879 transitions. Word has length 32 [2021-08-21 18:54:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:27,896 INFO L470 AbstractCegarLoop]: Abstraction has 8195 states and 19879 transitions. [2021-08-21 18:54:27,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8195 states and 19879 transitions. [2021-08-21 18:54:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:27,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:27,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:27,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:28,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 18:54:28,130 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -452434613, now seen corresponding path program 2 times [2021-08-21 18:54:28,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:28,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61436740] [2021-08-21 18:54:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:28,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:28,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:28,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61436740] [2021-08-21 18:54:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61436740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:28,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910980360] [2021-08-21 18:54:28,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:28,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:28,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:28,179 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:28,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:54:29,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:29,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910980360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:29,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:29,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:29,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332302215] [2021-08-21 18:54:29,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:29,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:29,963 INFO L87 Difference]: Start difference. First operand 8195 states and 19879 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:30,037 INFO L93 Difference]: Finished difference Result 9381 states and 22241 transitions. [2021-08-21 18:54:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:30,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:30,051 INFO L225 Difference]: With dead ends: 9381 [2021-08-21 18:54:30,051 INFO L226 Difference]: Without dead ends: 9373 [2021-08-21 18:54:30,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-08-21 18:54:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 8241. [2021-08-21 18:54:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8241 states, 8240 states have (on average 2.4286407766990292) internal successors, (20012), 8240 states have internal predecessors, (20012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 20012 transitions. [2021-08-21 18:54:30,154 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 20012 transitions. Word has length 32 [2021-08-21 18:54:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:30,155 INFO L470 AbstractCegarLoop]: Abstraction has 8241 states and 20012 transitions. [2021-08-21 18:54:30,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 20012 transitions. [2021-08-21 18:54:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:30,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:30,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:30,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:30,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:30,381 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1410433777, now seen corresponding path program 1 times [2021-08-21 18:54:30,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436870394] [2021-08-21 18:54:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:30,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436870394] [2021-08-21 18:54:30,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436870394] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:30,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:30,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:30,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490361153] [2021-08-21 18:54:30,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:30,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,433 INFO L87 Difference]: Start difference. First operand 8241 states and 20012 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:30,513 INFO L93 Difference]: Finished difference Result 9636 states and 22891 transitions. [2021-08-21 18:54:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:30,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:30,529 INFO L225 Difference]: With dead ends: 9636 [2021-08-21 18:54:30,529 INFO L226 Difference]: Without dead ends: 9628 [2021-08-21 18:54:30,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9628 states. [2021-08-21 18:54:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9628 to 8343. [2021-08-21 18:54:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8343 states, 8342 states have (on average 2.4337089426995924) internal successors, (20302), 8342 states have internal predecessors, (20302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8343 states to 8343 states and 20302 transitions. [2021-08-21 18:54:30,642 INFO L78 Accepts]: Start accepts. Automaton has 8343 states and 20302 transitions. Word has length 32 [2021-08-21 18:54:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:30,642 INFO L470 AbstractCegarLoop]: Abstraction has 8343 states and 20302 transitions. [2021-08-21 18:54:30,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8343 states and 20302 transitions. [2021-08-21 18:54:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:30,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:30,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:30,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-21 18:54:30,655 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash -89139373, now seen corresponding path program 2 times [2021-08-21 18:54:30,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368778947] [2021-08-21 18:54:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:30,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368778947] [2021-08-21 18:54:30,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368778947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:30,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551648773] [2021-08-21 18:54:30,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:30,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:30,744 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:30,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:54:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:32,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551648773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:32,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:32,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:32,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956383995] [2021-08-21 18:54:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:32,493 INFO L87 Difference]: Start difference. First operand 8343 states and 20302 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:32,576 INFO L93 Difference]: Finished difference Result 9605 states and 22878 transitions. [2021-08-21 18:54:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:32,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:32,590 INFO L225 Difference]: With dead ends: 9605 [2021-08-21 18:54:32,590 INFO L226 Difference]: Without dead ends: 9597 [2021-08-21 18:54:32,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-08-21 18:54:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 8397. [2021-08-21 18:54:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8397 states, 8396 states have (on average 2.4380657455931396) internal successors, (20470), 8396 states have internal predecessors, (20470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8397 states to 8397 states and 20470 transitions. [2021-08-21 18:54:32,698 INFO L78 Accepts]: Start accepts. Automaton has 8397 states and 20470 transitions. Word has length 32 [2021-08-21 18:54:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:32,699 INFO L470 AbstractCegarLoop]: Abstraction has 8397 states and 20470 transitions. [2021-08-21 18:54:32,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8397 states and 20470 transitions. [2021-08-21 18:54:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:32,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:32,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:32,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:32,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:32,929 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash 525039315, now seen corresponding path program 3 times [2021-08-21 18:54:32,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:32,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952197022] [2021-08-21 18:54:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:32,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:32,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:32,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952197022] [2021-08-21 18:54:32,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952197022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:32,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967961463] [2021-08-21 18:54:32,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:32,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:32,979 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:54:34,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:34,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967961463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:34,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:34,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116284683] [2021-08-21 18:54:34,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:34,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:34,752 INFO L87 Difference]: Start difference. First operand 8397 states and 20470 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:34,826 INFO L93 Difference]: Finished difference Result 9602 states and 22868 transitions. [2021-08-21 18:54:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,839 INFO L225 Difference]: With dead ends: 9602 [2021-08-21 18:54:34,839 INFO L226 Difference]: Without dead ends: 9594 [2021-08-21 18:54:34,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9594 states. [2021-08-21 18:54:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9594 to 8473. [2021-08-21 18:54:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8473 states, 8472 states have (on average 2.4401558073654392) internal successors, (20673), 8472 states have internal predecessors, (20673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8473 states to 8473 states and 20673 transitions. [2021-08-21 18:54:34,937 INFO L78 Accepts]: Start accepts. Automaton has 8473 states and 20673 transitions. Word has length 32 [2021-08-21 18:54:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,937 INFO L470 AbstractCegarLoop]: Abstraction has 8473 states and 20673 transitions. [2021-08-21 18:54:34,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8473 states and 20673 transitions. [2021-08-21 18:54:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:34,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:34,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:35,170 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:35,170 INFO L82 PathProgramCache]: Analyzing trace with hash -935567273, now seen corresponding path program 2 times [2021-08-21 18:54:35,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:35,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122310289] [2021-08-21 18:54:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:35,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:35,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122310289] [2021-08-21 18:54:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122310289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126708127] [2021-08-21 18:54:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:35,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:35,233 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:35,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:54:36,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:36,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:37,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126708127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:37,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:37,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:37,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167516104] [2021-08-21 18:54:37,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:37,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,062 INFO L87 Difference]: Start difference. First operand 8473 states and 20673 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,138 INFO L93 Difference]: Finished difference Result 9621 states and 22930 transitions. [2021-08-21 18:54:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:37,152 INFO L225 Difference]: With dead ends: 9621 [2021-08-21 18:54:37,152 INFO L226 Difference]: Without dead ends: 9613 [2021-08-21 18:54:37,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2021-08-21 18:54:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 8516. [2021-08-21 18:54:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8516 states, 8515 states have (on average 2.4387551379917793) internal successors, (20766), 8515 states have internal predecessors, (20766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8516 states to 8516 states and 20766 transitions. [2021-08-21 18:54:37,252 INFO L78 Accepts]: Start accepts. Automaton has 8516 states and 20766 transitions. Word has length 32 [2021-08-21 18:54:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:37,252 INFO L470 AbstractCegarLoop]: Abstraction has 8516 states and 20766 transitions. [2021-08-21 18:54:37,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8516 states and 20766 transitions. [2021-08-21 18:54:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:37,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:37,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:37,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:37,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:54:37,483 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 917821803, now seen corresponding path program 1 times [2021-08-21 18:54:37,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:37,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674456757] [2021-08-21 18:54:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:37,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:37,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:37,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674456757] [2021-08-21 18:54:37,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674456757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:37,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:37,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:37,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610971934] [2021-08-21 18:54:37,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:37,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,532 INFO L87 Difference]: Start difference. First operand 8516 states and 20766 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,615 INFO L93 Difference]: Finished difference Result 9800 states and 23256 transitions. [2021-08-21 18:54:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:37,631 INFO L225 Difference]: With dead ends: 9800 [2021-08-21 18:54:37,631 INFO L226 Difference]: Without dead ends: 9788 [2021-08-21 18:54:37,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2021-08-21 18:54:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 8553. [2021-08-21 18:54:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8553 states, 8552 states have (on average 2.440715622076707) internal successors, (20873), 8552 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8553 states to 8553 states and 20873 transitions. [2021-08-21 18:54:37,747 INFO L78 Accepts]: Start accepts. Automaton has 8553 states and 20873 transitions. Word has length 32 [2021-08-21 18:54:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:37,747 INFO L470 AbstractCegarLoop]: Abstraction has 8553 states and 20873 transitions. [2021-08-21 18:54:37,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8553 states and 20873 transitions. [2021-08-21 18:54:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:37,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:37,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:37,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-21 18:54:37,759 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 536262111, now seen corresponding path program 1 times [2021-08-21 18:54:37,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:37,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182877032] [2021-08-21 18:54:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:37,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:37,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:37,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182877032] [2021-08-21 18:54:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182877032] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:37,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547469897] [2021-08-21 18:54:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,808 INFO L87 Difference]: Start difference. First operand 8553 states and 20873 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,900 INFO L93 Difference]: Finished difference Result 9983 states and 23839 transitions. [2021-08-21 18:54:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:38,004 INFO L225 Difference]: With dead ends: 9983 [2021-08-21 18:54:38,004 INFO L226 Difference]: Without dead ends: 9975 [2021-08-21 18:54:38,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2021-08-21 18:54:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 8646. [2021-08-21 18:54:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8646 states, 8645 states have (on average 2.4486986697513013) internal successors, (21169), 8645 states have internal predecessors, (21169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 21169 transitions. [2021-08-21 18:54:38,101 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 21169 transitions. Word has length 32 [2021-08-21 18:54:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:38,101 INFO L470 AbstractCegarLoop]: Abstraction has 8646 states and 21169 transitions. [2021-08-21 18:54:38,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 21169 transitions. [2021-08-21 18:54:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:38,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:38,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-21 18:54:38,114 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2067201709, now seen corresponding path program 1 times [2021-08-21 18:54:38,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:38,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682598206] [2021-08-21 18:54:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:38,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:38,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:38,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682598206] [2021-08-21 18:54:38,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682598206] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:38,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:38,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:38,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401789137] [2021-08-21 18:54:38,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:38,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:38,162 INFO L87 Difference]: Start difference. First operand 8646 states and 21169 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:38,251 INFO L93 Difference]: Finished difference Result 9996 states and 23928 transitions. [2021-08-21 18:54:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:38,266 INFO L225 Difference]: With dead ends: 9996 [2021-08-21 18:54:38,266 INFO L226 Difference]: Without dead ends: 9988 [2021-08-21 18:54:38,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9988 states. [2021-08-21 18:54:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9988 to 8694. [2021-08-21 18:54:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8694 states, 8693 states have (on average 2.4531232025767857) internal successors, (21325), 8693 states have internal predecessors, (21325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8694 states to 8694 states and 21325 transitions. [2021-08-21 18:54:38,376 INFO L78 Accepts]: Start accepts. Automaton has 8694 states and 21325 transitions. Word has length 32 [2021-08-21 18:54:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 8694 states and 21325 transitions. [2021-08-21 18:54:38,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8694 states and 21325 transitions. [2021-08-21 18:54:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:38,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:38,388 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:38,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-21 18:54:38,389 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash 872527075, now seen corresponding path program 3 times [2021-08-21 18:54:38,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:38,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830138599] [2021-08-21 18:54:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:38,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:38,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:38,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830138599] [2021-08-21 18:54:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830138599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:38,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322989844] [2021-08-21 18:54:38,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:38,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:38,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:38,457 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:38,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:54:40,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:40,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322989844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:40,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:40,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:40,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163098678] [2021-08-21 18:54:40,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:40,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:40,371 INFO L87 Difference]: Start difference. First operand 8694 states and 21325 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:40,456 INFO L93 Difference]: Finished difference Result 9898 states and 23752 transitions. [2021-08-21 18:54:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:40,472 INFO L225 Difference]: With dead ends: 9898 [2021-08-21 18:54:40,472 INFO L226 Difference]: Without dead ends: 9890 [2021-08-21 18:54:40,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9890 states. [2021-08-21 18:54:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9890 to 8740. [2021-08-21 18:54:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8740 states, 8739 states have (on average 2.4589769996567115) internal successors, (21489), 8739 states have internal predecessors, (21489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8740 states to 8740 states and 21489 transitions. [2021-08-21 18:54:40,580 INFO L78 Accepts]: Start accepts. Automaton has 8740 states and 21489 transitions. Word has length 32 [2021-08-21 18:54:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:40,580 INFO L470 AbstractCegarLoop]: Abstraction has 8740 states and 21489 transitions. [2021-08-21 18:54:40,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8740 states and 21489 transitions. [2021-08-21 18:54:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:40,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:40,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:40,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:40,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:40,812 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 94344915, now seen corresponding path program 4 times [2021-08-21 18:54:40,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:40,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617586135] [2021-08-21 18:54:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:40,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:40,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:40,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617586135] [2021-08-21 18:54:40,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617586135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:40,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738370152] [2021-08-21 18:54:40,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:40,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:40,863 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:40,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:54:42,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:42,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:42,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:42,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738370152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:42,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:42,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:42,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222790188] [2021-08-21 18:54:42,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:42,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:42,773 INFO L87 Difference]: Start difference. First operand 8740 states and 21489 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:42,879 INFO L93 Difference]: Finished difference Result 9984 states and 24041 transitions. [2021-08-21 18:54:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:42,895 INFO L225 Difference]: With dead ends: 9984 [2021-08-21 18:54:42,895 INFO L226 Difference]: Without dead ends: 9976 [2021-08-21 18:54:42,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9976 states. [2021-08-21 18:54:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9976 to 8797. [2021-08-21 18:54:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8797 states, 8796 states have (on average 2.469417917235107) internal successors, (21721), 8796 states have internal predecessors, (21721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8797 states to 8797 states and 21721 transitions. [2021-08-21 18:54:43,032 INFO L78 Accepts]: Start accepts. Automaton has 8797 states and 21721 transitions. Word has length 32 [2021-08-21 18:54:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:43,032 INFO L470 AbstractCegarLoop]: Abstraction has 8797 states and 21721 transitions. [2021-08-21 18:54:43,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:43,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8797 states and 21721 transitions. [2021-08-21 18:54:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:43,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:43,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:43,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:43,265 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1080411033, now seen corresponding path program 2 times [2021-08-21 18:54:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:43,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47599765] [2021-08-21 18:54:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:43,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:43,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:43,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47599765] [2021-08-21 18:54:43,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47599765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:43,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108529071] [2021-08-21 18:54:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:43,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:43,324 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:43,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:54:45,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:45,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:45,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108529071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:45,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:45,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:45,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105482630] [2021-08-21 18:54:45,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:45,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:45,167 INFO L87 Difference]: Start difference. First operand 8797 states and 21721 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:45,254 INFO L93 Difference]: Finished difference Result 9911 states and 23943 transitions. [2021-08-21 18:54:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:45,270 INFO L225 Difference]: With dead ends: 9911 [2021-08-21 18:54:45,270 INFO L226 Difference]: Without dead ends: 9903 [2021-08-21 18:54:45,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2021-08-21 18:54:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 8811. [2021-08-21 18:54:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 2.471850170261067) internal successors, (21777), 8810 states have internal predecessors, (21777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 21777 transitions. [2021-08-21 18:54:45,459 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 21777 transitions. Word has length 32 [2021-08-21 18:54:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:45,460 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 21777 transitions. [2021-08-21 18:54:45,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 21777 transitions. [2021-08-21 18:54:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:45,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:45,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:45,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:45,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 18:54:45,685 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1858593193, now seen corresponding path program 2 times [2021-08-21 18:54:45,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:45,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147476887] [2021-08-21 18:54:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:45,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:45,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:45,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147476887] [2021-08-21 18:54:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147476887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:45,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924026913] [2021-08-21 18:54:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:45,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:45,735 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:45,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:54:47,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:47,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924026913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:47,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:47,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:47,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892723362] [2021-08-21 18:54:47,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:47,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:47,591 INFO L87 Difference]: Start difference. First operand 8811 states and 21777 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:47,687 INFO L93 Difference]: Finished difference Result 10041 states and 24307 transitions. [2021-08-21 18:54:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:47,702 INFO L225 Difference]: With dead ends: 10041 [2021-08-21 18:54:47,702 INFO L226 Difference]: Without dead ends: 10033 [2021-08-21 18:54:47,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2021-08-21 18:54:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 8858. [2021-08-21 18:54:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 8857 states have (on average 2.480749689511121) internal successors, (21972), 8857 states have internal predecessors, (21972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 21972 transitions. [2021-08-21 18:54:47,813 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 21972 transitions. Word has length 32 [2021-08-21 18:54:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:47,814 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 21972 transitions. [2021-08-21 18:54:47,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 21972 transitions. [2021-08-21 18:54:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:47,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:47,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:47,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:48,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 18:54:48,040 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 483435995, now seen corresponding path program 2 times [2021-08-21 18:54:48,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:48,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399184317] [2021-08-21 18:54:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:48,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:48,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399184317] [2021-08-21 18:54:48,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399184317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546104205] [2021-08-21 18:54:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:48,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:48,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:48,091 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:48,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:54:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:49,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:49,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546104205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:49,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:49,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570497201] [2021-08-21 18:54:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:49,989 INFO L87 Difference]: Start difference. First operand 8858 states and 21972 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:50,083 INFO L93 Difference]: Finished difference Result 10103 states and 24526 transitions. [2021-08-21 18:54:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:50,098 INFO L225 Difference]: With dead ends: 10103 [2021-08-21 18:54:50,099 INFO L226 Difference]: Without dead ends: 10095 [2021-08-21 18:54:50,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10095 states. [2021-08-21 18:54:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10095 to 8910. [2021-08-21 18:54:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8910 states, 8909 states have (on average 2.4879335503423503) internal successors, (22165), 8909 states have internal predecessors, (22165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8910 states to 8910 states and 22165 transitions. [2021-08-21 18:54:50,212 INFO L78 Accepts]: Start accepts. Automaton has 8910 states and 22165 transitions. Word has length 32 [2021-08-21 18:54:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:50,212 INFO L470 AbstractCegarLoop]: Abstraction has 8910 states and 22165 transitions. [2021-08-21 18:54:50,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 8910 states and 22165 transitions. [2021-08-21 18:54:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:50,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:50,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:50,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:50,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:50,445 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1469502113, now seen corresponding path program 2 times [2021-08-21 18:54:50,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:50,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625958182] [2021-08-21 18:54:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:50,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:50,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:50,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625958182] [2021-08-21 18:54:50,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625958182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:50,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056489142] [2021-08-21 18:54:50,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:50,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:50,506 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:50,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:54:52,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:52,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:52,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:52,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:52,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056489142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:52,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:52,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003157850] [2021-08-21 18:54:52,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:52,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:52,478 INFO L87 Difference]: Start difference. First operand 8910 states and 22165 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:52,568 INFO L93 Difference]: Finished difference Result 10084 states and 24558 transitions. [2021-08-21 18:54:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:52,584 INFO L225 Difference]: With dead ends: 10084 [2021-08-21 18:54:52,584 INFO L226 Difference]: Without dead ends: 10076 [2021-08-21 18:54:52,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10076 states. [2021-08-21 18:54:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10076 to 8938. [2021-08-21 18:54:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8937 states have (on average 2.4928947073962178) internal successors, (22279), 8937 states have internal predecessors, (22279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 22279 transitions. [2021-08-21 18:54:52,698 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 22279 transitions. Word has length 32 [2021-08-21 18:54:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:52,698 INFO L470 AbstractCegarLoop]: Abstraction has 8938 states and 22279 transitions. [2021-08-21 18:54:52,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 22279 transitions. [2021-08-21 18:54:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:52,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:52,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:52,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:52,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:52,926 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash 647900323, now seen corresponding path program 5 times [2021-08-21 18:54:52,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:52,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165200616] [2021-08-21 18:54:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:52,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:52,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:52,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165200616] [2021-08-21 18:54:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165200616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:52,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882739459] [2021-08-21 18:54:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:52,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:52,983 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:52,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:54:54,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:54,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:54,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882739459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:54,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:54,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45341601] [2021-08-21 18:54:54,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:54,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,978 INFO L87 Difference]: Start difference. First operand 8938 states and 22279 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:55,070 INFO L93 Difference]: Finished difference Result 10024 states and 24557 transitions. [2021-08-21 18:54:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:55,087 INFO L225 Difference]: With dead ends: 10024 [2021-08-21 18:54:55,087 INFO L226 Difference]: Without dead ends: 10016 [2021-08-21 18:54:55,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-08-21 18:54:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 8980. [2021-08-21 18:54:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8980 states, 8979 states have (on average 2.4994988306047445) internal successors, (22443), 8979 states have internal predecessors, (22443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8980 states to 8980 states and 22443 transitions. [2021-08-21 18:54:55,206 INFO L78 Accepts]: Start accepts. Automaton has 8980 states and 22443 transitions. Word has length 32 [2021-08-21 18:54:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:55,206 INFO L470 AbstractCegarLoop]: Abstraction has 8980 states and 22443 transitions. [2021-08-21 18:54:55,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8980 states and 22443 transitions. [2021-08-21 18:54:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:55,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:55,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:55,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:55,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-21 18:54:55,433 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -958743529, now seen corresponding path program 4 times [2021-08-21 18:54:55,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:55,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184659045] [2021-08-21 18:54:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:55,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:55,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184659045] [2021-08-21 18:54:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184659045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20319688] [2021-08-21 18:54:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:55,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:55,482 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:55,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:54:57,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20319688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:57,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:57,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:57,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413567121] [2021-08-21 18:54:57,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:57,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:57,509 INFO L87 Difference]: Start difference. First operand 8980 states and 22443 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:57,607 INFO L93 Difference]: Finished difference Result 10074 states and 24713 transitions. [2021-08-21 18:54:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:54:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:57,624 INFO L225 Difference]: With dead ends: 10074 [2021-08-21 18:54:57,624 INFO L226 Difference]: Without dead ends: 10066 [2021-08-21 18:54:57,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10066 states. [2021-08-21 18:54:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10066 to 9007. [2021-08-21 18:54:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9007 states, 9006 states have (on average 2.5048856318010215) internal successors, (22559), 9006 states have internal predecessors, (22559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9007 states to 9007 states and 22559 transitions. [2021-08-21 18:54:57,747 INFO L78 Accepts]: Start accepts. Automaton has 9007 states and 22559 transitions. Word has length 32 [2021-08-21 18:54:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 9007 states and 22559 transitions. [2021-08-21 18:54:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 9007 states and 22559 transitions. [2021-08-21 18:54:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:54:57,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:57,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:57,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:57,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 18:54:57,969 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:54:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:57,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2117502243, now seen corresponding path program 5 times [2021-08-21 18:54:57,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:57,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013778008] [2021-08-21 18:54:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:57,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:58,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:58,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013778008] [2021-08-21 18:54:58,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013778008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:58,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720422552] [2021-08-21 18:54:58,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:58,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:58,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:58,043 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:58,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:54:59,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:00,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720422552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:00,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:00,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:00,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979393295] [2021-08-21 18:55:00,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:00,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:00,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:00,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:00,054 INFO L87 Difference]: Start difference. First operand 9007 states and 22559 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:00,155 INFO L93 Difference]: Finished difference Result 10064 states and 24765 transitions. [2021-08-21 18:55:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:00,171 INFO L225 Difference]: With dead ends: 10064 [2021-08-21 18:55:00,171 INFO L226 Difference]: Without dead ends: 10056 [2021-08-21 18:55:00,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2021-08-21 18:55:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 9028. [2021-08-21 18:55:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9028 states, 9027 states have (on average 2.5101362578929876) internal successors, (22659), 9027 states have internal predecessors, (22659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 22659 transitions. [2021-08-21 18:55:00,314 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 22659 transitions. Word has length 32 [2021-08-21 18:55:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:00,314 INFO L470 AbstractCegarLoop]: Abstraction has 9028 states and 22659 transitions. [2021-08-21 18:55:00,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 22659 transitions. [2021-08-21 18:55:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:00,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:00,326 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:00,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:00,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:55:00,547 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1008460187, now seen corresponding path program 4 times [2021-08-21 18:55:00,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:00,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26539269] [2021-08-21 18:55:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:00,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:00,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:00,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26539269] [2021-08-21 18:55:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26539269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:00,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307820966] [2021-08-21 18:55:00,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:00,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:00,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:00,600 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:00,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:55:02,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:02,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307820966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:02,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:02,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:02,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531969164] [2021-08-21 18:55:02,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:02,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:02,598 INFO L87 Difference]: Start difference. First operand 9028 states and 22659 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:02,700 INFO L93 Difference]: Finished difference Result 10138 states and 24973 transitions. [2021-08-21 18:55:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:02,718 INFO L225 Difference]: With dead ends: 10138 [2021-08-21 18:55:02,718 INFO L226 Difference]: Without dead ends: 10130 [2021-08-21 18:55:02,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10130 states. [2021-08-21 18:55:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10130 to 9055. [2021-08-21 18:55:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 2.5148000883587365) internal successors, (22769), 9054 states have internal predecessors, (22769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 22769 transitions. [2021-08-21 18:55:02,850 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 22769 transitions. Word has length 32 [2021-08-21 18:55:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:02,850 INFO L470 AbstractCegarLoop]: Abstraction has 9055 states and 22769 transitions. [2021-08-21 18:55:02,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 22769 transitions. [2021-08-21 18:55:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:02,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:02,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:02,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:03,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 18:55:03,078 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -748987105, now seen corresponding path program 5 times [2021-08-21 18:55:03,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:03,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651242278] [2021-08-21 18:55:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:03,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:03,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:03,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651242278] [2021-08-21 18:55:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651242278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:03,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605807940] [2021-08-21 18:55:03,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:03,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:03,160 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:55:05,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:05,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605807940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:05,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:05,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:05,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903267948] [2021-08-21 18:55:05,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:05,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:05,190 INFO L87 Difference]: Start difference. First operand 9055 states and 22769 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:05,294 INFO L93 Difference]: Finished difference Result 10122 states and 24997 transitions. [2021-08-21 18:55:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:05,313 INFO L225 Difference]: With dead ends: 10122 [2021-08-21 18:55:05,314 INFO L226 Difference]: Without dead ends: 10114 [2021-08-21 18:55:05,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-08-21 18:55:05,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 9076. [2021-08-21 18:55:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9076 states, 9075 states have (on average 2.519338842975207) internal successors, (22863), 9075 states have internal predecessors, (22863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9076 states to 9076 states and 22863 transitions. [2021-08-21 18:55:05,452 INFO L78 Accepts]: Start accepts. Automaton has 9076 states and 22863 transitions. Word has length 32 [2021-08-21 18:55:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:05,452 INFO L470 AbstractCegarLoop]: Abstraction has 9076 states and 22863 transitions. [2021-08-21 18:55:05,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9076 states and 22863 transitions. [2021-08-21 18:55:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:05,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:05,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:05,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:05,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 18:55:05,684 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash -578080469, now seen corresponding path program 6 times [2021-08-21 18:55:05,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:05,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347320265] [2021-08-21 18:55:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:05,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:05,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:05,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347320265] [2021-08-21 18:55:05,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347320265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:05,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732037042] [2021-08-21 18:55:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:05,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:05,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:05,748 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:05,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:55:08,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:08,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732037042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:08,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:08,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:08,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931712925] [2021-08-21 18:55:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:08,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:08,290 INFO L87 Difference]: Start difference. First operand 9076 states and 22863 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:08,397 INFO L93 Difference]: Finished difference Result 10350 states and 25512 transitions. [2021-08-21 18:55:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:08,417 INFO L225 Difference]: With dead ends: 10350 [2021-08-21 18:55:08,417 INFO L226 Difference]: Without dead ends: 10342 [2021-08-21 18:55:08,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2021-08-21 18:55:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 9104. [2021-08-21 18:55:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 9103 states have (on average 2.5263100076897724) internal successors, (22997), 9103 states have internal predecessors, (22997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 22997 transitions. [2021-08-21 18:55:08,550 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 22997 transitions. Word has length 32 [2021-08-21 18:55:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:08,550 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 22997 transitions. [2021-08-21 18:55:08,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 22997 transitions. [2021-08-21 18:55:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:08,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:08,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:08,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:08,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:08,777 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash -936207325, now seen corresponding path program 3 times [2021-08-21 18:55:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050234706] [2021-08-21 18:55:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:08,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:08,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:08,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050234706] [2021-08-21 18:55:08,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050234706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:08,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166224362] [2021-08-21 18:55:08,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:08,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:08,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:08,829 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:08,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:55:10,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166224362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:10,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917750524] [2021-08-21 18:55:10,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:10,928 INFO L87 Difference]: Start difference. First operand 9104 states and 22997 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:11,027 INFO L93 Difference]: Finished difference Result 10284 states and 25321 transitions. [2021-08-21 18:55:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:11,048 INFO L225 Difference]: With dead ends: 10284 [2021-08-21 18:55:11,048 INFO L226 Difference]: Without dead ends: 10272 [2021-08-21 18:55:11,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10272 states. [2021-08-21 18:55:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10272 to 9124. [2021-08-21 18:55:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9124 states, 9123 states have (on average 2.5282253644634443) internal successors, (23065), 9123 states have internal predecessors, (23065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9124 states to 9124 states and 23065 transitions. [2021-08-21 18:55:11,181 INFO L78 Accepts]: Start accepts. Automaton has 9124 states and 23065 transitions. Word has length 32 [2021-08-21 18:55:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:11,181 INFO L470 AbstractCegarLoop]: Abstraction has 9124 states and 23065 transitions. [2021-08-21 18:55:11,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9124 states and 23065 transitions. [2021-08-21 18:55:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:11,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:11,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:11,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:55:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 18:55:11,415 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -982141321, now seen corresponding path program 6 times [2021-08-21 18:55:11,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:11,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418273207] [2021-08-21 18:55:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:11,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:11,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418273207] [2021-08-21 18:55:11,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418273207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256268226] [2021-08-21 18:55:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:11,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:11,466 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:11,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:55:13,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:13,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256268226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:13,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:13,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094715593] [2021-08-21 18:55:13,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:13,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:13,635 INFO L87 Difference]: Start difference. First operand 9124 states and 23065 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:13,734 INFO L93 Difference]: Finished difference Result 10426 states and 25778 transitions. [2021-08-21 18:55:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:13,752 INFO L225 Difference]: With dead ends: 10426 [2021-08-21 18:55:13,752 INFO L226 Difference]: Without dead ends: 10418 [2021-08-21 18:55:13,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10418 states. [2021-08-21 18:55:13,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10418 to 9151. [2021-08-21 18:55:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9151 states, 9150 states have (on average 2.53344262295082) internal successors, (23181), 9150 states have internal predecessors, (23181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9151 states to 9151 states and 23181 transitions. [2021-08-21 18:55:13,884 INFO L78 Accepts]: Start accepts. Automaton has 9151 states and 23181 transitions. Word has length 32 [2021-08-21 18:55:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:13,884 INFO L470 AbstractCegarLoop]: Abstraction has 9151 states and 23181 transitions. [2021-08-21 18:55:13,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9151 states and 23181 transitions. [2021-08-21 18:55:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:13,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:13,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:13,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:14,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:14,119 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:14,119 INFO L82 PathProgramCache]: Analyzing trace with hash -591419469, now seen corresponding path program 3 times [2021-08-21 18:55:14,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:14,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824840155] [2021-08-21 18:55:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:14,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:14,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:14,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824840155] [2021-08-21 18:55:14,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824840155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:14,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412167522] [2021-08-21 18:55:14,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:14,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:14,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:14,169 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:14,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:55:16,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:16,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412167522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:16,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:16,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:16,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494235789] [2021-08-21 18:55:16,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:16,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:16,367 INFO L87 Difference]: Start difference. First operand 9151 states and 23181 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:16,457 INFO L93 Difference]: Finished difference Result 10401 states and 25786 transitions. [2021-08-21 18:55:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:16,478 INFO L225 Difference]: With dead ends: 10401 [2021-08-21 18:55:16,481 INFO L226 Difference]: Without dead ends: 10393 [2021-08-21 18:55:16,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2021-08-21 18:55:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 9175. [2021-08-21 18:55:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9174 states have (on average 2.5365162415522127) internal successors, (23270), 9174 states have internal predecessors, (23270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 23270 transitions. [2021-08-21 18:55:16,608 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 23270 transitions. Word has length 32 [2021-08-21 18:55:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:16,608 INFO L470 AbstractCegarLoop]: Abstraction has 9175 states and 23270 transitions. [2021-08-21 18:55:16,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 23270 transitions. [2021-08-21 18:55:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:16,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:16,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:16,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:16,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:16,842 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1630484659, now seen corresponding path program 3 times [2021-08-21 18:55:16,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:16,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399512719] [2021-08-21 18:55:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:16,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:16,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:16,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399512719] [2021-08-21 18:55:16,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399512719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:16,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141009062] [2021-08-21 18:55:16,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:16,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:16,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:16,899 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:16,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:55:18,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:55:18,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141009062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:19,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:19,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:19,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443837453] [2021-08-21 18:55:19,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:19,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:19,059 INFO L87 Difference]: Start difference. First operand 9175 states and 23270 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:19,154 INFO L93 Difference]: Finished difference Result 10393 states and 25797 transitions. [2021-08-21 18:55:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:19,169 INFO L225 Difference]: With dead ends: 10393 [2021-08-21 18:55:19,169 INFO L226 Difference]: Without dead ends: 10385 [2021-08-21 18:55:19,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2021-08-21 18:55:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 9202. [2021-08-21 18:55:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9202 states, 9201 states have (on average 2.5432018258884903) internal successors, (23400), 9201 states have internal predecessors, (23400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9202 states to 9202 states and 23400 transitions. [2021-08-21 18:55:19,290 INFO L78 Accepts]: Start accepts. Automaton has 9202 states and 23400 transitions. Word has length 32 [2021-08-21 18:55:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 9202 states and 23400 transitions. [2021-08-21 18:55:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 9202 states and 23400 transitions. [2021-08-21 18:55:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:19,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:19,304 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:19,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:19,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:19,517 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 806677407, now seen corresponding path program 6 times [2021-08-21 18:55:19,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:19,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935012407] [2021-08-21 18:55:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:19,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:19,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:19,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935012407] [2021-08-21 18:55:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935012407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:19,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470338124] [2021-08-21 18:55:19,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:19,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:19,591 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:19,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:55:21,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:21,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470338124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:21,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:21,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:21,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494860715] [2021-08-21 18:55:21,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:21,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:21,880 INFO L87 Difference]: Start difference. First operand 9202 states and 23400 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:21,977 INFO L93 Difference]: Finished difference Result 10215 states and 25514 transitions. [2021-08-21 18:55:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:21,995 INFO L225 Difference]: With dead ends: 10215 [2021-08-21 18:55:21,995 INFO L226 Difference]: Without dead ends: 10207 [2021-08-21 18:55:21,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10207 states. [2021-08-21 18:55:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10207 to 9223. [2021-08-21 18:55:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9223 states, 9222 states have (on average 2.546302320537844) internal successors, (23482), 9222 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9223 states to 9223 states and 23482 transitions. [2021-08-21 18:55:22,126 INFO L78 Accepts]: Start accepts. Automaton has 9223 states and 23482 transitions. Word has length 32 [2021-08-21 18:55:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:22,126 INFO L470 AbstractCegarLoop]: Abstraction has 9223 states and 23482 transitions. [2021-08-21 18:55:22,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 9223 states and 23482 transitions. [2021-08-21 18:55:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:22,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:22,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:22,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-08-21 18:55:22,353 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash -591230301, now seen corresponding path program 3 times [2021-08-21 18:55:22,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:22,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610013199] [2021-08-21 18:55:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:22,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:22,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:22,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610013199] [2021-08-21 18:55:22,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610013199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700155776] [2021-08-21 18:55:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:22,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:22,403 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:55:24,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:24,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700155776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:24,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:24,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:24,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795455608] [2021-08-21 18:55:24,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:24,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:24,621 INFO L87 Difference]: Start difference. First operand 9223 states and 23482 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:24,710 INFO L93 Difference]: Finished difference Result 10409 states and 25805 transitions. [2021-08-21 18:55:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:24,729 INFO L225 Difference]: With dead ends: 10409 [2021-08-21 18:55:24,729 INFO L226 Difference]: Without dead ends: 10397 [2021-08-21 18:55:24,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10397 states. [2021-08-21 18:55:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10397 to 9271. [2021-08-21 18:55:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9271 states, 9270 states have (on average 2.549730312837109) internal successors, (23636), 9270 states have internal predecessors, (23636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9271 states to 9271 states and 23636 transitions. [2021-08-21 18:55:24,859 INFO L78 Accepts]: Start accepts. Automaton has 9271 states and 23636 transitions. Word has length 32 [2021-08-21 18:55:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 9271 states and 23636 transitions. [2021-08-21 18:55:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 9271 states and 23636 transitions. [2021-08-21 18:55:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:24,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:24,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:24,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,094 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:25,095 INFO L82 PathProgramCache]: Analyzing trace with hash -637164297, now seen corresponding path program 3 times [2021-08-21 18:55:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:25,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466009746] [2021-08-21 18:55:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:25,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:25,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:25,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466009746] [2021-08-21 18:55:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466009746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864272589] [2021-08-21 18:55:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:25,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:25,146 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:25,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:55:27,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864272589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:27,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:27,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:27,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082809243] [2021-08-21 18:55:27,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:27,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:27,326 INFO L87 Difference]: Start difference. First operand 9271 states and 23636 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:27,430 INFO L93 Difference]: Finished difference Result 10552 states and 26273 transitions. [2021-08-21 18:55:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:27,451 INFO L225 Difference]: With dead ends: 10552 [2021-08-21 18:55:27,451 INFO L226 Difference]: Without dead ends: 10544 [2021-08-21 18:55:27,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10544 states. [2021-08-21 18:55:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10544 to 9326. [2021-08-21 18:55:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9326 states, 9325 states have (on average 2.5569973190348527) internal successors, (23844), 9325 states have internal predecessors, (23844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9326 states to 9326 states and 23844 transitions. [2021-08-21 18:55:27,619 INFO L78 Accepts]: Start accepts. Automaton has 9326 states and 23844 transitions. Word has length 32 [2021-08-21 18:55:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:27,620 INFO L470 AbstractCegarLoop]: Abstraction has 9326 states and 23844 transitions. [2021-08-21 18:55:27,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9326 states and 23844 transitions. [2021-08-21 18:55:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:27,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:27,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:27,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 18:55:27,849 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -246442445, now seen corresponding path program 3 times [2021-08-21 18:55:27,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:27,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459237397] [2021-08-21 18:55:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:27,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:27,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:27,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459237397] [2021-08-21 18:55:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459237397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:27,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471431686] [2021-08-21 18:55:27,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:27,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:27,900 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:27,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:55:30,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:30,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:30,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471431686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:30,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:30,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132193862] [2021-08-21 18:55:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:30,193 INFO L87 Difference]: Start difference. First operand 9326 states and 23844 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:30,358 INFO L93 Difference]: Finished difference Result 10559 states and 26380 transitions. [2021-08-21 18:55:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:30,375 INFO L225 Difference]: With dead ends: 10559 [2021-08-21 18:55:30,376 INFO L226 Difference]: Without dead ends: 10551 [2021-08-21 18:55:30,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10551 states. [2021-08-21 18:55:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10551 to 9370. [2021-08-21 18:55:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9370 states, 9369 states have (on average 2.5615327142704665) internal successors, (23999), 9369 states have internal predecessors, (23999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9370 states to 9370 states and 23999 transitions. [2021-08-21 18:55:30,504 INFO L78 Accepts]: Start accepts. Automaton has 9370 states and 23999 transitions. Word has length 32 [2021-08-21 18:55:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:30,504 INFO L470 AbstractCegarLoop]: Abstraction has 9370 states and 23999 transitions. [2021-08-21 18:55:30,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states and 23999 transitions. [2021-08-21 18:55:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:30,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:30,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:30,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,733 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1975461683, now seen corresponding path program 3 times [2021-08-21 18:55:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:30,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972805360] [2021-08-21 18:55:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:30,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:30,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:30,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972805360] [2021-08-21 18:55:30,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972805360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336882809] [2021-08-21 18:55:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:30,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:30,783 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:55:32,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:55:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:33,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336882809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:33,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:33,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30045900] [2021-08-21 18:55:33,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:33,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:33,028 INFO L87 Difference]: Start difference. First operand 9370 states and 23999 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:33,126 INFO L93 Difference]: Finished difference Result 10583 states and 26495 transitions. [2021-08-21 18:55:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:33,143 INFO L225 Difference]: With dead ends: 10583 [2021-08-21 18:55:33,143 INFO L226 Difference]: Without dead ends: 10575 [2021-08-21 18:55:33,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2021-08-21 18:55:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 9412. [2021-08-21 18:55:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9412 states, 9411 states have (on average 2.5675273615981298) internal successors, (24163), 9411 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9412 states to 9412 states and 24163 transitions. [2021-08-21 18:55:33,340 INFO L78 Accepts]: Start accepts. Automaton has 9412 states and 24163 transitions. Word has length 32 [2021-08-21 18:55:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:33,341 INFO L470 AbstractCegarLoop]: Abstraction has 9412 states and 24163 transitions. [2021-08-21 18:55:33,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9412 states and 24163 transitions. [2021-08-21 18:55:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:33,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:33,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:33,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 18:55:33,572 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2104186069, now seen corresponding path program 4 times [2021-08-21 18:55:33,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:33,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513051364] [2021-08-21 18:55:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:33,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:33,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:33,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513051364] [2021-08-21 18:55:33,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513051364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057832493] [2021-08-21 18:55:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:33,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:33,624 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:33,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:55:35,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:35,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057832493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:35,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:35,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:35,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556973730] [2021-08-21 18:55:35,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:35,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:35,868 INFO L87 Difference]: Start difference. First operand 9412 states and 24163 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:35,962 INFO L93 Difference]: Finished difference Result 10550 states and 26538 transitions. [2021-08-21 18:55:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:35,979 INFO L225 Difference]: With dead ends: 10550 [2021-08-21 18:55:35,979 INFO L226 Difference]: Without dead ends: 10542 [2021-08-21 18:55:35,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-08-21 18:55:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 9462. [2021-08-21 18:55:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9462 states, 9461 states have (on average 2.5717154634816617) internal successors, (24331), 9461 states have internal predecessors, (24331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9462 states to 9462 states and 24331 transitions. [2021-08-21 18:55:36,190 INFO L78 Accepts]: Start accepts. Automaton has 9462 states and 24331 transitions. Word has length 32 [2021-08-21 18:55:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:36,190 INFO L470 AbstractCegarLoop]: Abstraction has 9462 states and 24331 transitions. [2021-08-21 18:55:36,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9462 states and 24331 transitions. [2021-08-21 18:55:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:36,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:36,204 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:36,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:36,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 18:55:36,425 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1779242023, now seen corresponding path program 4 times [2021-08-21 18:55:36,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:36,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160707106] [2021-08-21 18:55:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:36,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:36,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:36,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160707106] [2021-08-21 18:55:36,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160707106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:36,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109584519] [2021-08-21 18:55:36,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:36,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:36,477 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:36,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:55:38,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:38,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:38,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109584519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:38,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:38,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607499046] [2021-08-21 18:55:38,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:38,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:38,751 INFO L87 Difference]: Start difference. First operand 9462 states and 24331 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:38,845 INFO L93 Difference]: Finished difference Result 10565 states and 26626 transitions. [2021-08-21 18:55:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:38,863 INFO L225 Difference]: With dead ends: 10565 [2021-08-21 18:55:38,863 INFO L226 Difference]: Without dead ends: 10557 [2021-08-21 18:55:38,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10557 states. [2021-08-21 18:55:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10557 to 9503. [2021-08-21 18:55:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9503 states, 9502 states have (on average 2.5751420753525576) internal successors, (24469), 9502 states have internal predecessors, (24469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9503 states to 9503 states and 24469 transitions. [2021-08-21 18:55:39,045 INFO L78 Accepts]: Start accepts. Automaton has 9503 states and 24469 transitions. Word has length 32 [2021-08-21 18:55:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:39,045 INFO L470 AbstractCegarLoop]: Abstraction has 9503 states and 24469 transitions. [2021-08-21 18:55:39,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9503 states and 24469 transitions. [2021-08-21 18:55:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:39,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:39,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:39,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:39,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-21 18:55:39,280 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1954834413, now seen corresponding path program 4 times [2021-08-21 18:55:39,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:39,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91115296] [2021-08-21 18:55:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:39,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:39,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:39,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91115296] [2021-08-21 18:55:39,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91115296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:39,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163806074] [2021-08-21 18:55:39,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:39,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:39,332 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:39,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:55:41,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:41,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163806074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:41,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359958353] [2021-08-21 18:55:41,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:41,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:41,574 INFO L87 Difference]: Start difference. First operand 9503 states and 24469 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:41,666 INFO L93 Difference]: Finished difference Result 10732 states and 26958 transitions. [2021-08-21 18:55:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:41,683 INFO L225 Difference]: With dead ends: 10732 [2021-08-21 18:55:41,683 INFO L226 Difference]: Without dead ends: 10724 [2021-08-21 18:55:41,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-08-21 18:55:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 9532. [2021-08-21 18:55:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 2.581156227048578) internal successors, (24601), 9531 states have internal predecessors, (24601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 24601 transitions. [2021-08-21 18:55:41,840 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 24601 transitions. Word has length 32 [2021-08-21 18:55:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:41,840 INFO L470 AbstractCegarLoop]: Abstraction has 9532 states and 24601 transitions. [2021-08-21 18:55:41,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 24601 transitions. [2021-08-21 18:55:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:41,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:41,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:41,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:42,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 18:55:42,065 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2113256995, now seen corresponding path program 4 times [2021-08-21 18:55:42,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:42,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078855704] [2021-08-21 18:55:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:42,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:42,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:42,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078855704] [2021-08-21 18:55:42,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078855704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:42,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324878973] [2021-08-21 18:55:42,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:42,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:42,141 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:42,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:55:44,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:44,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324878973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:44,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:44,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:44,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066908095] [2021-08-21 18:55:44,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:44,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:44,462 INFO L87 Difference]: Start difference. First operand 9532 states and 24601 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:44,550 INFO L93 Difference]: Finished difference Result 10782 states and 27080 transitions. [2021-08-21 18:55:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:44,569 INFO L225 Difference]: With dead ends: 10782 [2021-08-21 18:55:44,569 INFO L226 Difference]: Without dead ends: 10774 [2021-08-21 18:55:44,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10774 states. [2021-08-21 18:55:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10774 to 9575. [2021-08-21 18:55:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9575 states, 9574 states have (on average 2.5814706496762065) internal successors, (24715), 9574 states have internal predecessors, (24715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9575 states to 9575 states and 24715 transitions. [2021-08-21 18:55:44,774 INFO L78 Accepts]: Start accepts. Automaton has 9575 states and 24715 transitions. Word has length 32 [2021-08-21 18:55:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:44,774 INFO L470 AbstractCegarLoop]: Abstraction has 9575 states and 24715 transitions. [2021-08-21 18:55:44,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9575 states and 24715 transitions. [2021-08-21 18:55:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:44,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:44,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:44,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:45,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:45,005 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash 801875831, now seen corresponding path program 1 times [2021-08-21 18:55:45,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:45,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193610456] [2021-08-21 18:55:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:45,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:45,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193610456] [2021-08-21 18:55:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193610456] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:45,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:45,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:45,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624970050] [2021-08-21 18:55:45,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:45,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:45,056 INFO L87 Difference]: Start difference. First operand 9575 states and 24715 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:45,146 INFO L93 Difference]: Finished difference Result 10952 states and 27436 transitions. [2021-08-21 18:55:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:45,165 INFO L225 Difference]: With dead ends: 10952 [2021-08-21 18:55:45,165 INFO L226 Difference]: Without dead ends: 10940 [2021-08-21 18:55:45,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10940 states. [2021-08-21 18:55:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10940 to 9635. [2021-08-21 18:55:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9635 states, 9634 states have (on average 2.5830392360390286) internal successors, (24885), 9634 states have internal predecessors, (24885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9635 states to 9635 states and 24885 transitions. [2021-08-21 18:55:45,306 INFO L78 Accepts]: Start accepts. Automaton has 9635 states and 24885 transitions. Word has length 32 [2021-08-21 18:55:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:45,306 INFO L470 AbstractCegarLoop]: Abstraction has 9635 states and 24885 transitions. [2021-08-21 18:55:45,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 9635 states and 24885 transitions. [2021-08-21 18:55:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:45,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:45,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:45,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-08-21 18:55:45,321 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1192597683, now seen corresponding path program 1 times [2021-08-21 18:55:45,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:45,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519858873] [2021-08-21 18:55:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:45,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:45,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:45,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519858873] [2021-08-21 18:55:45,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519858873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:45,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:45,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:45,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684309437] [2021-08-21 18:55:45,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:45,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:45,371 INFO L87 Difference]: Start difference. First operand 9635 states and 24885 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:45,459 INFO L93 Difference]: Finished difference Result 10970 states and 27511 transitions. [2021-08-21 18:55:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:45,478 INFO L225 Difference]: With dead ends: 10970 [2021-08-21 18:55:45,479 INFO L226 Difference]: Without dead ends: 10958 [2021-08-21 18:55:45,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10958 states. [2021-08-21 18:55:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10958 to 9691. [2021-08-21 18:55:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 9690 states have (on average 2.583075335397317) internal successors, (25030), 9690 states have internal predecessors, (25030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 25030 transitions. [2021-08-21 18:55:45,622 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 25030 transitions. Word has length 32 [2021-08-21 18:55:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:45,622 INFO L470 AbstractCegarLoop]: Abstraction has 9691 states and 25030 transitions. [2021-08-21 18:55:45,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 25030 transitions. [2021-08-21 18:55:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:45,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:45,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:45,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-08-21 18:55:45,636 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1859653407, now seen corresponding path program 5 times [2021-08-21 18:55:45,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:45,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503067897] [2021-08-21 18:55:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:45,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:45,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:45,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503067897] [2021-08-21 18:55:45,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503067897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:45,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226004393] [2021-08-21 18:55:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:45,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:45,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:45,688 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:45,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:55:47,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226004393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:48,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329075419] [2021-08-21 18:55:48,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:48,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:48,078 INFO L87 Difference]: Start difference. First operand 9691 states and 25030 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:48,171 INFO L93 Difference]: Finished difference Result 11007 states and 27684 transitions. [2021-08-21 18:55:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:48,189 INFO L225 Difference]: With dead ends: 11007 [2021-08-21 18:55:48,189 INFO L226 Difference]: Without dead ends: 10999 [2021-08-21 18:55:48,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10999 states. [2021-08-21 18:55:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10999 to 9751. [2021-08-21 18:55:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.587282051282051) internal successors, (25226), 9750 states have internal predecessors, (25226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 25226 transitions. [2021-08-21 18:55:48,317 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 25226 transitions. Word has length 32 [2021-08-21 18:55:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:48,317 INFO L470 AbstractCegarLoop]: Abstraction has 9751 states and 25226 transitions. [2021-08-21 18:55:48,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 25226 transitions. [2021-08-21 18:55:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:48,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:48,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:48,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:48,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,552 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash -469477861, now seen corresponding path program 2 times [2021-08-21 18:55:48,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:48,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465379134] [2021-08-21 18:55:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:48,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:48,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:48,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465379134] [2021-08-21 18:55:48,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465379134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:48,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870851781] [2021-08-21 18:55:48,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:48,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:48,605 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:48,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:55:50,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:51,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870851781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:51,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:51,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:51,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617789885] [2021-08-21 18:55:51,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:51,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:51,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:51,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:51,049 INFO L87 Difference]: Start difference. First operand 9751 states and 25226 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:51,142 INFO L93 Difference]: Finished difference Result 11002 states and 27715 transitions. [2021-08-21 18:55:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:51,160 INFO L225 Difference]: With dead ends: 11002 [2021-08-21 18:55:51,161 INFO L226 Difference]: Without dead ends: 10994 [2021-08-21 18:55:51,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2021-08-21 18:55:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 9789. [2021-08-21 18:55:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9789 states, 9788 states have (on average 2.590212505108296) internal successors, (25353), 9788 states have internal predecessors, (25353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9789 states to 9789 states and 25353 transitions. [2021-08-21 18:55:51,298 INFO L78 Accepts]: Start accepts. Automaton has 9789 states and 25353 transitions. Word has length 32 [2021-08-21 18:55:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:51,298 INFO L470 AbstractCegarLoop]: Abstraction has 9789 states and 25353 transitions. [2021-08-21 18:55:51,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 9789 states and 25353 transitions. [2021-08-21 18:55:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:51,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:51,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:51,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:51,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:51,534 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1427477025, now seen corresponding path program 1 times [2021-08-21 18:55:51,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:51,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576314663] [2021-08-21 18:55:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:51,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:51,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576314663] [2021-08-21 18:55:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576314663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:51,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217205803] [2021-08-21 18:55:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:51,586 INFO L87 Difference]: Start difference. First operand 9789 states and 25353 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:51,681 INFO L93 Difference]: Finished difference Result 11250 states and 28320 transitions. [2021-08-21 18:55:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:51,700 INFO L225 Difference]: With dead ends: 11250 [2021-08-21 18:55:51,700 INFO L226 Difference]: Without dead ends: 11242 [2021-08-21 18:55:51,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-08-21 18:55:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 9855. [2021-08-21 18:55:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9855 states, 9854 states have (on average 2.5968134767607065) internal successors, (25589), 9854 states have internal predecessors, (25589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9855 states to 9855 states and 25589 transitions. [2021-08-21 18:55:51,838 INFO L78 Accepts]: Start accepts. Automaton has 9855 states and 25589 transitions. Word has length 32 [2021-08-21 18:55:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:51,838 INFO L470 AbstractCegarLoop]: Abstraction has 9855 states and 25589 transitions. [2021-08-21 18:55:51,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9855 states and 25589 transitions. [2021-08-21 18:55:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:51,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:51,852 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:51,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-08-21 18:55:51,852 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:51,852 INFO L82 PathProgramCache]: Analyzing trace with hash -106182621, now seen corresponding path program 2 times [2021-08-21 18:55:51,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:51,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807550039] [2021-08-21 18:55:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:51,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:51,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:51,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807550039] [2021-08-21 18:55:51,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807550039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:51,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017931372] [2021-08-21 18:55:51,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:51,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:51,906 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:51,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:55:54,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:54,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:54,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017931372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:54,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:54,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:54,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910949094] [2021-08-21 18:55:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:54,360 INFO L87 Difference]: Start difference. First operand 9855 states and 25589 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:54,461 INFO L93 Difference]: Finished difference Result 11175 states and 28287 transitions. [2021-08-21 18:55:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:54,478 INFO L225 Difference]: With dead ends: 11175 [2021-08-21 18:55:54,479 INFO L226 Difference]: Without dead ends: 11167 [2021-08-21 18:55:54,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11167 states. [2021-08-21 18:55:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11167 to 9901. [2021-08-21 18:55:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9900 states have (on average 2.602626262626263) internal successors, (25766), 9900 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 25766 transitions. [2021-08-21 18:55:54,608 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 25766 transitions. Word has length 32 [2021-08-21 18:55:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:54,608 INFO L470 AbstractCegarLoop]: Abstraction has 9901 states and 25766 transitions. [2021-08-21 18:55:54,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 25766 transitions. [2021-08-21 18:55:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:54,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:54,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:54,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:54,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:54,841 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 507996067, now seen corresponding path program 5 times [2021-08-21 18:55:54,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:54,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728625277] [2021-08-21 18:55:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:54,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:54,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:54,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728625277] [2021-08-21 18:55:54,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728625277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:54,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234005684] [2021-08-21 18:55:54,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:54,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:54,892 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:54,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:55:56,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:57,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234005684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:57,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125394026] [2021-08-21 18:55:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:57,115 INFO L87 Difference]: Start difference. First operand 9901 states and 25766 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:57,208 INFO L93 Difference]: Finished difference Result 11155 states and 28306 transitions. [2021-08-21 18:55:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:57,226 INFO L225 Difference]: With dead ends: 11155 [2021-08-21 18:55:57,227 INFO L226 Difference]: Without dead ends: 11147 [2021-08-21 18:55:57,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2021-08-21 18:55:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 9950. [2021-08-21 18:55:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9950 states, 9949 states have (on average 2.605286963513921) internal successors, (25920), 9949 states have internal predecessors, (25920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9950 states to 9950 states and 25920 transitions. [2021-08-21 18:55:57,357 INFO L78 Accepts]: Start accepts. Automaton has 9950 states and 25920 transitions. Word has length 32 [2021-08-21 18:55:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:57,357 INFO L470 AbstractCegarLoop]: Abstraction has 9950 states and 25920 transitions. [2021-08-21 18:55:57,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9950 states and 25920 transitions. [2021-08-21 18:55:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:57,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:57,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:57,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:57,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 18:55:57,573 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:55:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -952610521, now seen corresponding path program 2 times [2021-08-21 18:55:57,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:57,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942880620] [2021-08-21 18:55:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:57,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:57,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:57,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942880620] [2021-08-21 18:55:57,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942880620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:57,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920536295] [2021-08-21 18:55:57,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:57,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:57,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:57,695 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:57,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:55:59,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:00,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920536295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:00,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:00,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:00,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102155352] [2021-08-21 18:56:00,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:00,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:00,142 INFO L87 Difference]: Start difference. First operand 9950 states and 25920 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:00,233 INFO L93 Difference]: Finished difference Result 11166 states and 28352 transitions. [2021-08-21 18:56:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:00,255 INFO L225 Difference]: With dead ends: 11166 [2021-08-21 18:56:00,255 INFO L226 Difference]: Without dead ends: 11158 [2021-08-21 18:56:00,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11158 states. [2021-08-21 18:56:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11158 to 9980. [2021-08-21 18:56:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9980 states, 9979 states have (on average 2.6057721214550558) internal successors, (26003), 9979 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9980 states to 9980 states and 26003 transitions. [2021-08-21 18:56:00,404 INFO L78 Accepts]: Start accepts. Automaton has 9980 states and 26003 transitions. Word has length 32 [2021-08-21 18:56:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:00,404 INFO L470 AbstractCegarLoop]: Abstraction has 9980 states and 26003 transitions. [2021-08-21 18:56:00,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9980 states and 26003 transitions. [2021-08-21 18:56:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:00,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:00,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:00,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:00,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 18:56:00,668 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash 900778555, now seen corresponding path program 1 times [2021-08-21 18:56:00,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:00,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450657398] [2021-08-21 18:56:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:00,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:00,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:00,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450657398] [2021-08-21 18:56:00,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450657398] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:00,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:00,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:56:00,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269413495] [2021-08-21 18:56:00,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:00,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:00,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:00,718 INFO L87 Difference]: Start difference. First operand 9980 states and 26003 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:00,813 INFO L93 Difference]: Finished difference Result 11333 states and 28628 transitions. [2021-08-21 18:56:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:00,831 INFO L225 Difference]: With dead ends: 11333 [2021-08-21 18:56:00,832 INFO L226 Difference]: Without dead ends: 11321 [2021-08-21 18:56:00,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11321 states. [2021-08-21 18:56:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11321 to 10007. [2021-08-21 18:56:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10006 states have (on average 2.6075354787127725) internal successors, (26091), 10006 states have internal predecessors, (26091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 26091 transitions. [2021-08-21 18:56:00,970 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 26091 transitions. Word has length 32 [2021-08-21 18:56:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:00,970 INFO L470 AbstractCegarLoop]: Abstraction has 10007 states and 26091 transitions. [2021-08-21 18:56:00,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 26091 transitions. [2021-08-21 18:56:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:00,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:00,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:00,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-08-21 18:56:00,985 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 519218863, now seen corresponding path program 1 times [2021-08-21 18:56:00,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:00,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419962597] [2021-08-21 18:56:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:00,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:01,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419962597] [2021-08-21 18:56:01,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419962597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:01,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:01,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:56:01,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902511738] [2021-08-21 18:56:01,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:01,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:01,036 INFO L87 Difference]: Start difference. First operand 10007 states and 26091 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:01,142 INFO L93 Difference]: Finished difference Result 11497 states and 29140 transitions. [2021-08-21 18:56:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:01,162 INFO L225 Difference]: With dead ends: 11497 [2021-08-21 18:56:01,163 INFO L226 Difference]: Without dead ends: 11489 [2021-08-21 18:56:01,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-08-21 18:56:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 10077. [2021-08-21 18:56:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10077 states, 10076 states have (on average 2.614529575228265) internal successors, (26344), 10076 states have internal predecessors, (26344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 26344 transitions. [2021-08-21 18:56:01,310 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 26344 transitions. Word has length 32 [2021-08-21 18:56:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 10077 states and 26344 transitions. [2021-08-21 18:56:01,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 26344 transitions. [2021-08-21 18:56:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:01,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:01,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:01,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-21 18:56:01,324 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2084244957, now seen corresponding path program 1 times [2021-08-21 18:56:01,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:01,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021144857] [2021-08-21 18:56:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:01,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:01,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021144857] [2021-08-21 18:56:01,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021144857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:01,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:01,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:56:01,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899763227] [2021-08-21 18:56:01,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:01,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:01,374 INFO L87 Difference]: Start difference. First operand 10077 states and 26344 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:01,475 INFO L93 Difference]: Finished difference Result 11510 states and 29283 transitions. [2021-08-21 18:56:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:01,495 INFO L225 Difference]: With dead ends: 11510 [2021-08-21 18:56:01,495 INFO L226 Difference]: Without dead ends: 11502 [2021-08-21 18:56:01,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11502 states. [2021-08-21 18:56:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11502 to 10115. [2021-08-21 18:56:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10115 states, 10114 states have (on average 2.619438402214752) internal successors, (26493), 10114 states have internal predecessors, (26493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10115 states to 10115 states and 26493 transitions. [2021-08-21 18:56:01,633 INFO L78 Accepts]: Start accepts. Automaton has 10115 states and 26493 transitions. Word has length 32 [2021-08-21 18:56:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:01,633 INFO L470 AbstractCegarLoop]: Abstraction has 10115 states and 26493 transitions. [2021-08-21 18:56:01,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 10115 states and 26493 transitions. [2021-08-21 18:56:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:01,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:01,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:01,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-21 18:56:01,649 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash 855483827, now seen corresponding path program 4 times [2021-08-21 18:56:01,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:01,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954839117] [2021-08-21 18:56:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:01,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:01,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954839117] [2021-08-21 18:56:01,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954839117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:01,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175227350] [2021-08-21 18:56:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:01,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:01,702 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:01,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:56:04,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:04,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175227350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:04,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:04,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386135303] [2021-08-21 18:56:04,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:04,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:04,170 INFO L87 Difference]: Start difference. First operand 10115 states and 26493 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:04,270 INFO L93 Difference]: Finished difference Result 11355 states and 29041 transitions. [2021-08-21 18:56:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:04,287 INFO L225 Difference]: With dead ends: 11355 [2021-08-21 18:56:04,287 INFO L226 Difference]: Without dead ends: 11347 [2021-08-21 18:56:04,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11347 states. [2021-08-21 18:56:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11347 to 10146. [2021-08-21 18:56:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.6249383932971906) internal successors, (26630), 10145 states have internal predecessors, (26630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26630 transitions. [2021-08-21 18:56:04,440 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26630 transitions. Word has length 32 [2021-08-21 18:56:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:04,440 INFO L470 AbstractCegarLoop]: Abstraction has 10146 states and 26630 transitions. [2021-08-21 18:56:04,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26630 transitions. [2021-08-21 18:56:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:04,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:04,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:04,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:04,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,679 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 77301667, now seen corresponding path program 4 times [2021-08-21 18:56:04,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:04,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305589009] [2021-08-21 18:56:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:04,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:04,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:04,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305589009] [2021-08-21 18:56:04,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305589009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893391376] [2021-08-21 18:56:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:04,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:04,738 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:04,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:56:07,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893391376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:07,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:07,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948962100] [2021-08-21 18:56:07,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:07,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:07,248 INFO L87 Difference]: Start difference. First operand 10146 states and 26630 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:07,362 INFO L93 Difference]: Finished difference Result 11419 states and 29266 transitions. [2021-08-21 18:56:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:07,385 INFO L225 Difference]: With dead ends: 11419 [2021-08-21 18:56:07,385 INFO L226 Difference]: Without dead ends: 11411 [2021-08-21 18:56:07,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11411 states. [2021-08-21 18:56:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11411 to 10182. [2021-08-21 18:56:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 2.6315686081917296) internal successors, (26792), 10181 states have internal predecessors, (26792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26792 transitions. [2021-08-21 18:56:07,529 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26792 transitions. Word has length 32 [2021-08-21 18:56:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:07,529 INFO L470 AbstractCegarLoop]: Abstraction has 10182 states and 26792 transitions. [2021-08-21 18:56:07,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26792 transitions. [2021-08-21 18:56:07,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:07,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:07,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:07,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,765 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1097454281, now seen corresponding path program 2 times [2021-08-21 18:56:07,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:07,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532698081] [2021-08-21 18:56:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:07,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:07,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532698081] [2021-08-21 18:56:07,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532698081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893233060] [2021-08-21 18:56:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:07,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:07,817 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:07,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:56:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893233060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:10,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836418208] [2021-08-21 18:56:10,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:10,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:10,370 INFO L87 Difference]: Start difference. First operand 10182 states and 26792 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:10,466 INFO L93 Difference]: Finished difference Result 11344 states and 29140 transitions. [2021-08-21 18:56:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:10,485 INFO L225 Difference]: With dead ends: 11344 [2021-08-21 18:56:10,485 INFO L226 Difference]: Without dead ends: 11336 [2021-08-21 18:56:10,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-08-21 18:56:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10191. [2021-08-21 18:56:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10191 states, 10190 states have (on average 2.6335623159960746) internal successors, (26836), 10190 states have internal predecessors, (26836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10191 states to 10191 states and 26836 transitions. [2021-08-21 18:56:10,621 INFO L78 Accepts]: Start accepts. Automaton has 10191 states and 26836 transitions. Word has length 32 [2021-08-21 18:56:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:10,621 INFO L470 AbstractCegarLoop]: Abstraction has 10191 states and 26836 transitions. [2021-08-21 18:56:10,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 10191 states and 26836 transitions. [2021-08-21 18:56:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:10,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:10,638 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:10,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:10,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-08-21 18:56:10,839 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1875636441, now seen corresponding path program 3 times [2021-08-21 18:56:10,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:10,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170190760] [2021-08-21 18:56:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:10,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:10,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:10,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170190760] [2021-08-21 18:56:10,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170190760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:10,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740817767] [2021-08-21 18:56:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:10,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:10,947 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:10,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:56:13,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:13,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:13,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740817767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:13,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:13,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:13,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350922935] [2021-08-21 18:56:13,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:13,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:13,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:13,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:13,532 INFO L87 Difference]: Start difference. First operand 10191 states and 26836 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:13,637 INFO L93 Difference]: Finished difference Result 11461 states and 29482 transitions. [2021-08-21 18:56:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:13,656 INFO L225 Difference]: With dead ends: 11461 [2021-08-21 18:56:13,656 INFO L226 Difference]: Without dead ends: 11453 [2021-08-21 18:56:13,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11453 states. [2021-08-21 18:56:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11453 to 10227. [2021-08-21 18:56:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 10226 states have (on average 2.6393506747506357) internal successors, (26990), 10226 states have internal predecessors, (26990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 26990 transitions. [2021-08-21 18:56:13,874 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 26990 transitions. Word has length 32 [2021-08-21 18:56:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:13,874 INFO L470 AbstractCegarLoop]: Abstraction has 10227 states and 26990 transitions. [2021-08-21 18:56:13,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 26990 transitions. [2021-08-21 18:56:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:13,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:13,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:13,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:14,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:14,101 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 466392747, now seen corresponding path program 2 times [2021-08-21 18:56:14,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:14,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116682317] [2021-08-21 18:56:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:14,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:14,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:14,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116682317] [2021-08-21 18:56:14,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116682317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:14,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557826585] [2021-08-21 18:56:14,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:14,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:14,152 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:14,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:56:16,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:16,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:16,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:16,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557826585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:16,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:16,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:16,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490245654] [2021-08-21 18:56:16,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:16,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:16,569 INFO L87 Difference]: Start difference. First operand 10227 states and 26990 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:16,741 INFO L93 Difference]: Finished difference Result 11508 states and 29656 transitions. [2021-08-21 18:56:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:16,761 INFO L225 Difference]: With dead ends: 11508 [2021-08-21 18:56:16,761 INFO L226 Difference]: Without dead ends: 11500 [2021-08-21 18:56:16,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-08-21 18:56:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 10263. [2021-08-21 18:56:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.6443188462288054) internal successors, (27136), 10262 states have internal predecessors, (27136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 27136 transitions. [2021-08-21 18:56:16,898 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 27136 transitions. Word has length 32 [2021-08-21 18:56:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 10263 states and 27136 transitions. [2021-08-21 18:56:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 27136 transitions. [2021-08-21 18:56:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:16,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:16,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:16,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 18:56:17,135 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1486545361, now seen corresponding path program 2 times [2021-08-21 18:56:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:17,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453533219] [2021-08-21 18:56:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:17,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:17,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453533219] [2021-08-21 18:56:17,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453533219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68238990] [2021-08-21 18:56:17,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:17,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:17,188 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:17,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:56:19,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:19,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68238990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:19,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:19,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196732602] [2021-08-21 18:56:19,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:19,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:19,825 INFO L87 Difference]: Start difference. First operand 10263 states and 27136 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:19,930 INFO L93 Difference]: Finished difference Result 11477 states and 29643 transitions. [2021-08-21 18:56:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:19,949 INFO L225 Difference]: With dead ends: 11477 [2021-08-21 18:56:19,949 INFO L226 Difference]: Without dead ends: 11469 [2021-08-21 18:56:19,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11469 states. [2021-08-21 18:56:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11469 to 10280. [2021-08-21 18:56:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10280 states, 10279 states have (on average 2.647728378246911) internal successors, (27216), 10279 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10280 states to 10280 states and 27216 transitions. [2021-08-21 18:56:20,090 INFO L78 Accepts]: Start accepts. Automaton has 10280 states and 27216 transitions. Word has length 32 [2021-08-21 18:56:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:20,090 INFO L470 AbstractCegarLoop]: Abstraction has 10280 states and 27216 transitions. [2021-08-21 18:56:20,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10280 states and 27216 transitions. [2021-08-21 18:56:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:20,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:20,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:20,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:20,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:20,321 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash 509541159, now seen corresponding path program 6 times [2021-08-21 18:56:20,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:20,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689390293] [2021-08-21 18:56:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:20,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:20,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:20,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689390293] [2021-08-21 18:56:20,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689390293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:20,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147717879] [2021-08-21 18:56:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:20,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:20,374 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:20,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:56:22,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:56:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147717879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:23,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:23,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:23,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160220331] [2021-08-21 18:56:23,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:23,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:23,010 INFO L87 Difference]: Start difference. First operand 10280 states and 27216 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:23,110 INFO L93 Difference]: Finished difference Result 11357 states and 29403 transitions. [2021-08-21 18:56:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:23,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:23,129 INFO L225 Difference]: With dead ends: 11357 [2021-08-21 18:56:23,129 INFO L226 Difference]: Without dead ends: 11349 [2021-08-21 18:56:23,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11349 states. [2021-08-21 18:56:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11349 to 10315. [2021-08-21 18:56:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.65115377157262) internal successors, (27344), 10314 states have internal predecessors, (27344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 27344 transitions. [2021-08-21 18:56:23,265 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 27344 transitions. Word has length 32 [2021-08-21 18:56:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:23,265 INFO L470 AbstractCegarLoop]: Abstraction has 10315 states and 27344 transitions. [2021-08-21 18:56:23,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 27344 transitions. [2021-08-21 18:56:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:23,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:23,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:23,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:23,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 18:56:23,495 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -230670437, now seen corresponding path program 3 times [2021-08-21 18:56:23,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:23,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678547721] [2021-08-21 18:56:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:23,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:23,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678547721] [2021-08-21 18:56:23,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678547721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312573686] [2021-08-21 18:56:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:23,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:23,547 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:23,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:56:26,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:26,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:26,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:26,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312573686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:26,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:26,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:26,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482601239] [2021-08-21 18:56:26,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:26,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:26,290 INFO L87 Difference]: Start difference. First operand 10315 states and 27344 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:26,386 INFO L93 Difference]: Finished difference Result 11589 states and 29841 transitions. [2021-08-21 18:56:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:26,408 INFO L225 Difference]: With dead ends: 11589 [2021-08-21 18:56:26,408 INFO L226 Difference]: Without dead ends: 11577 [2021-08-21 18:56:26,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2021-08-21 18:56:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 10344. [2021-08-21 18:56:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.6530020303586968) internal successors, (27440), 10343 states have internal predecessors, (27440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27440 transitions. [2021-08-21 18:56:26,553 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27440 transitions. Word has length 32 [2021-08-21 18:56:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:26,553 INFO L470 AbstractCegarLoop]: Abstraction has 10344 states and 27440 transitions. [2021-08-21 18:56:26,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27440 transitions. [2021-08-21 18:56:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:26,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:26,569 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:26,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 18:56:26,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 18:56:26,785 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash -276604433, now seen corresponding path program 3 times [2021-08-21 18:56:26,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:26,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912698117] [2021-08-21 18:56:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:26,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:26,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:26,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912698117] [2021-08-21 18:56:26,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912698117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:26,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361435504] [2021-08-21 18:56:26,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:26,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:26,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:26,837 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:26,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:56:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361435504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:29,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919910528] [2021-08-21 18:56:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:29,447 INFO L87 Difference]: Start difference. First operand 10344 states and 27440 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:29,545 INFO L93 Difference]: Finished difference Result 11767 states and 30377 transitions. [2021-08-21 18:56:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:29,564 INFO L225 Difference]: With dead ends: 11767 [2021-08-21 18:56:29,564 INFO L226 Difference]: Without dead ends: 11759 [2021-08-21 18:56:29,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11759 states. [2021-08-21 18:56:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11759 to 10398. [2021-08-21 18:56:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10398 states, 10397 states have (on average 2.6579782629604694) internal successors, (27635), 10397 states have internal predecessors, (27635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10398 states to 10398 states and 27635 transitions. [2021-08-21 18:56:29,705 INFO L78 Accepts]: Start accepts. Automaton has 10398 states and 27635 transitions. Word has length 32 [2021-08-21 18:56:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:29,705 INFO L470 AbstractCegarLoop]: Abstraction has 10398 states and 27635 transitions. [2021-08-21 18:56:29,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10398 states and 27635 transitions. [2021-08-21 18:56:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:29,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:29,724 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:29,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 18:56:29,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:29,931 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash 114117419, now seen corresponding path program 3 times [2021-08-21 18:56:29,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:29,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829907506] [2021-08-21 18:56:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:29,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:29,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:29,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829907506] [2021-08-21 18:56:29,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829907506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:29,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575063682] [2021-08-21 18:56:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:29,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:29,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:29,988 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:29,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:56:32,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:32,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575063682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:32,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:32,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:32,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681401114] [2021-08-21 18:56:32,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:32,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:32,711 INFO L87 Difference]: Start difference. First operand 10398 states and 27635 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:32,809 INFO L93 Difference]: Finished difference Result 11749 states and 30431 transitions. [2021-08-21 18:56:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:32,828 INFO L225 Difference]: With dead ends: 11749 [2021-08-21 18:56:32,829 INFO L226 Difference]: Without dead ends: 11741 [2021-08-21 18:56:32,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-08-21 18:56:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 10432. [2021-08-21 18:56:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10432 states, 10431 states have (on average 2.6618732623909502) internal successors, (27766), 10431 states have internal predecessors, (27766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10432 states to 10432 states and 27766 transitions. [2021-08-21 18:56:32,970 INFO L78 Accepts]: Start accepts. Automaton has 10432 states and 27766 transitions. Word has length 32 [2021-08-21 18:56:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 10432 states and 27766 transitions. [2021-08-21 18:56:32,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10432 states and 27766 transitions. [2021-08-21 18:56:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:32,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:32,984 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:33,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:33,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-21 18:56:33,202 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1958945749, now seen corresponding path program 3 times [2021-08-21 18:56:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:33,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025005853] [2021-08-21 18:56:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:33,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:33,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:33,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025005853] [2021-08-21 18:56:33,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025005853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:33,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709415179] [2021-08-21 18:56:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:33,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:33,255 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:56:35,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:35,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:35,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:35,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709415179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:35,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:35,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:35,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094756619] [2021-08-21 18:56:35,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:35,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:35,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:35,992 INFO L87 Difference]: Start difference. First operand 10432 states and 27766 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:36,102 INFO L93 Difference]: Finished difference Result 11777 states and 30566 transitions. [2021-08-21 18:56:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:36,125 INFO L225 Difference]: With dead ends: 11777 [2021-08-21 18:56:36,125 INFO L226 Difference]: Without dead ends: 11769 [2021-08-21 18:56:36,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11769 states. [2021-08-21 18:56:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11769 to 10481. [2021-08-21 18:56:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10481 states, 10480 states have (on average 2.667652671755725) internal successors, (27957), 10480 states have internal predecessors, (27957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 27957 transitions. [2021-08-21 18:56:36,358 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 27957 transitions. Word has length 32 [2021-08-21 18:56:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:36,358 INFO L470 AbstractCegarLoop]: Abstraction has 10481 states and 27957 transitions. [2021-08-21 18:56:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 27957 transitions. [2021-08-21 18:56:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:36,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:36,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:36,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:36,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:36,589 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2139801887, now seen corresponding path program 4 times [2021-08-21 18:56:36,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:36,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268565874] [2021-08-21 18:56:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:36,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:36,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268565874] [2021-08-21 18:56:36,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268565874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:36,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769802008] [2021-08-21 18:56:36,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:36,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:36,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:36,640 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:36,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:56:39,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:39,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:39,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:39,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:39,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769802008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:39,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:39,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:39,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154881084] [2021-08-21 18:56:39,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:39,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:39,356 INFO L87 Difference]: Start difference. First operand 10481 states and 27957 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:39,533 INFO L93 Difference]: Finished difference Result 11641 states and 30375 transitions. [2021-08-21 18:56:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:39,552 INFO L225 Difference]: With dead ends: 11641 [2021-08-21 18:56:39,552 INFO L226 Difference]: Without dead ends: 11633 [2021-08-21 18:56:39,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11633 states. [2021-08-21 18:56:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11633 to 10517. [2021-08-21 18:56:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 10516 states have (on average 2.671833396728794) internal successors, (28097), 10516 states have internal predecessors, (28097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 28097 transitions. [2021-08-21 18:56:39,694 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 28097 transitions. Word has length 32 [2021-08-21 18:56:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:39,694 INFO L470 AbstractCegarLoop]: Abstraction has 10517 states and 28097 transitions. [2021-08-21 18:56:39,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 28097 transitions. [2021-08-21 18:56:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:39,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:39,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:39,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:39,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:39,933 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 382354595, now seen corresponding path program 5 times [2021-08-21 18:56:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127020099] [2021-08-21 18:56:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:39,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:39,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:39,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127020099] [2021-08-21 18:56:39,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127020099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:39,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465436636] [2021-08-21 18:56:39,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:39,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:39,986 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:39,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:56:42,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:42,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:42,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465436636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:42,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595623245] [2021-08-21 18:56:42,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:42,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:42,785 INFO L87 Difference]: Start difference. First operand 10517 states and 28097 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:42,887 INFO L93 Difference]: Finished difference Result 11625 states and 30400 transitions. [2021-08-21 18:56:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:42,906 INFO L225 Difference]: With dead ends: 11625 [2021-08-21 18:56:42,906 INFO L226 Difference]: Without dead ends: 11617 [2021-08-21 18:56:42,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11617 states. [2021-08-21 18:56:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11617 to 10545. [2021-08-21 18:56:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10545 states, 10544 states have (on average 2.6759294385432475) internal successors, (28215), 10544 states have internal predecessors, (28215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10545 states to 10545 states and 28215 transitions. [2021-08-21 18:56:43,055 INFO L78 Accepts]: Start accepts. Automaton has 10545 states and 28215 transitions. Word has length 32 [2021-08-21 18:56:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:43,055 INFO L470 AbstractCegarLoop]: Abstraction has 10545 states and 28215 transitions. [2021-08-21 18:56:43,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10545 states and 28215 transitions. [2021-08-21 18:56:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:43,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:43,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:43,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 18:56:43,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:43,282 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1736533279, now seen corresponding path program 3 times [2021-08-21 18:56:43,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:43,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747826243] [2021-08-21 18:56:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:43,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:43,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747826243] [2021-08-21 18:56:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747826243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:43,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507627678] [2021-08-21 18:56:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:43,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:43,337 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:43,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:56:45,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:46,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507627678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:46,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:46,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:46,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768163066] [2021-08-21 18:56:46,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:46,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:46,145 INFO L87 Difference]: Start difference. First operand 10545 states and 28215 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:46,243 INFO L93 Difference]: Finished difference Result 11781 states and 30657 transitions. [2021-08-21 18:56:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:46,266 INFO L225 Difference]: With dead ends: 11781 [2021-08-21 18:56:46,266 INFO L226 Difference]: Without dead ends: 11769 [2021-08-21 18:56:46,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11769 states. [2021-08-21 18:56:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11769 to 10574. [2021-08-21 18:56:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10574 states, 10573 states have (on average 2.6771020523976166) internal successors, (28305), 10573 states have internal predecessors, (28305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10574 states to 10574 states and 28305 transitions. [2021-08-21 18:56:46,411 INFO L78 Accepts]: Start accepts. Automaton has 10574 states and 28305 transitions. Word has length 32 [2021-08-21 18:56:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:46,412 INFO L470 AbstractCegarLoop]: Abstraction has 10574 states and 28305 transitions. [2021-08-21 18:56:46,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10574 states and 28305 transitions. [2021-08-21 18:56:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:46,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:46,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:46,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:46,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,642 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1690599283, now seen corresponding path program 6 times [2021-08-21 18:56:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:46,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093251736] [2021-08-21 18:56:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:46,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:46,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:46,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093251736] [2021-08-21 18:56:46,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093251736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:46,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564201258] [2021-08-21 18:56:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:46,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:46,696 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:46,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:56:49,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:56:49,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:49,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564201258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:49,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:49,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:49,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331867459] [2021-08-21 18:56:49,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:49,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:49,431 INFO L87 Difference]: Start difference. First operand 10574 states and 28305 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:49,539 INFO L93 Difference]: Finished difference Result 11942 states and 31150 transitions. [2021-08-21 18:56:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:49,560 INFO L225 Difference]: With dead ends: 11942 [2021-08-21 18:56:49,560 INFO L226 Difference]: Without dead ends: 11934 [2021-08-21 18:56:49,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11934 states. [2021-08-21 18:56:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11934 to 10610. [2021-08-21 18:56:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.681968140258271) internal successors, (28453), 10609 states have internal predecessors, (28453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 28453 transitions. [2021-08-21 18:56:49,702 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 28453 transitions. Word has length 32 [2021-08-21 18:56:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 10610 states and 28453 transitions. [2021-08-21 18:56:49,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 28453 transitions. [2021-08-21 18:56:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:49,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:49,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:49,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 18:56:49,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:49,926 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2081321135, now seen corresponding path program 3 times [2021-08-21 18:56:49,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:49,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733230562] [2021-08-21 18:56:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:49,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:49,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:49,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733230562] [2021-08-21 18:56:49,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733230562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:49,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033628620] [2021-08-21 18:56:49,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:49,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:49,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:49,979 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:49,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:56:52,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:52,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033628620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:52,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:52,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:52,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114130250] [2021-08-21 18:56:52,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:52,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:52,940 INFO L87 Difference]: Start difference. First operand 10610 states and 28453 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:53,038 INFO L93 Difference]: Finished difference Result 11926 states and 31199 transitions. [2021-08-21 18:56:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:53,060 INFO L225 Difference]: With dead ends: 11926 [2021-08-21 18:56:53,060 INFO L226 Difference]: Without dead ends: 11918 [2021-08-21 18:56:53,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-08-21 18:56:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 10644. [2021-08-21 18:56:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10644 states, 10643 states have (on average 2.684957248895988) internal successors, (28576), 10643 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10644 states to 10644 states and 28576 transitions. [2021-08-21 18:56:53,217 INFO L78 Accepts]: Start accepts. Automaton has 10644 states and 28576 transitions. Word has length 32 [2021-08-21 18:56:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:53,217 INFO L470 AbstractCegarLoop]: Abstraction has 10644 states and 28576 transitions. [2021-08-21 18:56:53,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10644 states and 28576 transitions. [2021-08-21 18:56:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:53,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:53,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:53,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:53,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 18:56:53,449 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 8257967, now seen corresponding path program 3 times [2021-08-21 18:56:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:53,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521550467] [2021-08-21 18:56:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:53,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:53,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521550467] [2021-08-21 18:56:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521550467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742673543] [2021-08-21 18:56:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:53,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:53,545 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:53,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:56:56,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:56,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:56,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:56,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742673543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:56,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:56,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:56,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843663100] [2021-08-21 18:56:56,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:56,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:56,355 INFO L87 Difference]: Start difference. First operand 10644 states and 28576 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:56,537 INFO L93 Difference]: Finished difference Result 11930 states and 31258 transitions. [2021-08-21 18:56:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:56,555 INFO L225 Difference]: With dead ends: 11930 [2021-08-21 18:56:56,555 INFO L226 Difference]: Without dead ends: 11922 [2021-08-21 18:56:56,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2021-08-21 18:56:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 10671. [2021-08-21 18:56:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10671 states, 10670 states have (on average 2.689409559512652) internal successors, (28696), 10670 states have internal predecessors, (28696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 28696 transitions. [2021-08-21 18:56:56,695 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 28696 transitions. Word has length 32 [2021-08-21 18:56:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:56,695 INFO L470 AbstractCegarLoop]: Abstraction has 10671 states and 28696 transitions. [2021-08-21 18:56:56,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 28696 transitions. [2021-08-21 18:56:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:56,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:56,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:56,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:56,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 18:56:56,912 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:56:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1938019107, now seen corresponding path program 6 times [2021-08-21 18:56:56,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:56,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286863268] [2021-08-21 18:56:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:56,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:56,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:56,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286863268] [2021-08-21 18:56:56,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286863268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:56,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505680520] [2021-08-21 18:56:56,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:56,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:56,966 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:56,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:56:59,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:56:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:59,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505680520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:59,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:59,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:59,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925022212] [2021-08-21 18:56:59,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:59,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:59,881 INFO L87 Difference]: Start difference. First operand 10671 states and 28696 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:59,979 INFO L93 Difference]: Finished difference Result 11732 states and 30897 transitions. [2021-08-21 18:56:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:00,000 INFO L225 Difference]: With dead ends: 11732 [2021-08-21 18:57:00,000 INFO L226 Difference]: Without dead ends: 11724 [2021-08-21 18:57:00,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11724 states. [2021-08-21 18:57:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11724 to 10699. [2021-08-21 18:57:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.691905028977379) internal successors, (28798), 10698 states have internal predecessors, (28798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 28798 transitions. [2021-08-21 18:57:00,147 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 28798 transitions. Word has length 32 [2021-08-21 18:57:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:00,147 INFO L470 AbstractCegarLoop]: Abstraction has 10699 states and 28798 transitions. [2021-08-21 18:57:00,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 28798 transitions. [2021-08-21 18:57:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:00,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:00,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:00,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 18:57:00,386 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash 789550059, now seen corresponding path program 5 times [2021-08-21 18:57:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:00,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762524184] [2021-08-21 18:57:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:00,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:00,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:00,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762524184] [2021-08-21 18:57:00,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762524184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:00,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747074141] [2021-08-21 18:57:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:00,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:00,441 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:00,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:57:03,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:03,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747074141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:03,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:03,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:03,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262474977] [2021-08-21 18:57:03,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:03,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:03,341 INFO L87 Difference]: Start difference. First operand 10699 states and 28798 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:03,433 INFO L93 Difference]: Finished difference Result 11765 states and 30971 transitions. [2021-08-21 18:57:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:03,453 INFO L225 Difference]: With dead ends: 11765 [2021-08-21 18:57:03,453 INFO L226 Difference]: Without dead ends: 11757 [2021-08-21 18:57:03,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2021-08-21 18:57:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 10717. [2021-08-21 18:57:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10717 states, 10716 states have (on average 2.692515864128406) internal successors, (28853), 10716 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 28853 transitions. [2021-08-21 18:57:03,592 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 28853 transitions. Word has length 32 [2021-08-21 18:57:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 10717 states and 28853 transitions. [2021-08-21 18:57:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 28853 transitions. [2021-08-21 18:57:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:03,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:03,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:03,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:03,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:03,833 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:03,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1346379887, now seen corresponding path program 6 times [2021-08-21 18:57:03,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:03,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422583410] [2021-08-21 18:57:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:03,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:03,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422583410] [2021-08-21 18:57:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422583410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95805025] [2021-08-21 18:57:03,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:03,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:03,918 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:03,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:57:06,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:06,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95805025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:06,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:06,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:06,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252485969] [2021-08-21 18:57:06,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:06,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:06,825 INFO L87 Difference]: Start difference. First operand 10717 states and 28853 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:06,927 INFO L93 Difference]: Finished difference Result 11752 states and 30961 transitions. [2021-08-21 18:57:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:06,947 INFO L225 Difference]: With dead ends: 11752 [2021-08-21 18:57:06,947 INFO L226 Difference]: Without dead ends: 11744 [2021-08-21 18:57:06,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11744 states. [2021-08-21 18:57:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11744 to 10731. [2021-08-21 18:57:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10731 states, 10730 states have (on average 2.6937558247903075) internal successors, (28904), 10730 states have internal predecessors, (28904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10731 states to 10731 states and 28904 transitions. [2021-08-21 18:57:07,099 INFO L78 Accepts]: Start accepts. Automaton has 10731 states and 28904 transitions. Word has length 32 [2021-08-21 18:57:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:07,099 INFO L470 AbstractCegarLoop]: Abstraction has 10731 states and 28904 transitions. [2021-08-21 18:57:07,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10731 states and 28904 transitions. [2021-08-21 18:57:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:07,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:07,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:07,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:07,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:07,341 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -98513859, now seen corresponding path program 5 times [2021-08-21 18:57:07,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:07,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880398999] [2021-08-21 18:57:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:07,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:07,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:07,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880398999] [2021-08-21 18:57:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880398999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:07,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349485890] [2021-08-21 18:57:07,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:07,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:07,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:07,395 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:07,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:57:10,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:10,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349485890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:10,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:10,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:10,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931066944] [2021-08-21 18:57:10,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:10,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:10,373 INFO L87 Difference]: Start difference. First operand 10731 states and 28904 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:10,482 INFO L93 Difference]: Finished difference Result 11820 states and 31127 transitions. [2021-08-21 18:57:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:10,503 INFO L225 Difference]: With dead ends: 11820 [2021-08-21 18:57:10,503 INFO L226 Difference]: Without dead ends: 11812 [2021-08-21 18:57:10,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11812 states. [2021-08-21 18:57:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11812 to 10749. [2021-08-21 18:57:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10749 states, 10748 states have (on average 2.6954782285076293) internal successors, (28971), 10748 states have internal predecessors, (28971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10749 states to 10749 states and 28971 transitions. [2021-08-21 18:57:10,738 INFO L78 Accepts]: Start accepts. Automaton has 10749 states and 28971 transitions. Word has length 32 [2021-08-21 18:57:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:10,739 INFO L470 AbstractCegarLoop]: Abstraction has 10749 states and 28971 transitions. [2021-08-21 18:57:10,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10749 states and 28971 transitions. [2021-08-21 18:57:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:10,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:10,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:10,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:10,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:10,976 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1252535163, now seen corresponding path program 6 times [2021-08-21 18:57:10,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:10,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787364301] [2021-08-21 18:57:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:10,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:11,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:11,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787364301] [2021-08-21 18:57:11,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787364301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:11,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573344229] [2021-08-21 18:57:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:11,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:11,030 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:11,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:57:13,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573344229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:13,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104915241] [2021-08-21 18:57:13,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:13,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:13,952 INFO L87 Difference]: Start difference. First operand 10749 states and 28971 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:14,054 INFO L93 Difference]: Finished difference Result 11803 states and 31123 transitions. [2021-08-21 18:57:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:14,074 INFO L225 Difference]: With dead ends: 11803 [2021-08-21 18:57:14,074 INFO L226 Difference]: Without dead ends: 11795 [2021-08-21 18:57:14,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11795 states. [2021-08-21 18:57:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11795 to 10763. [2021-08-21 18:57:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10763 states, 10762 states have (on average 2.697825682958558) internal successors, (29034), 10762 states have internal predecessors, (29034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 29034 transitions. [2021-08-21 18:57:14,215 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 29034 transitions. Word has length 32 [2021-08-21 18:57:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:14,215 INFO L470 AbstractCegarLoop]: Abstraction has 10763 states and 29034 transitions. [2021-08-21 18:57:14,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 29034 transitions. [2021-08-21 18:57:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:14,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:14,231 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:14,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:14,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 18:57:14,456 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -89674453, now seen corresponding path program 3 times [2021-08-21 18:57:14,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:14,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865495100] [2021-08-21 18:57:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:14,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:14,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:14,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865495100] [2021-08-21 18:57:14,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865495100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:14,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417150640] [2021-08-21 18:57:14,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:14,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:14,511 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:14,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:57:17,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:57:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:17,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417150640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:17,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:17,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:17,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649194125] [2021-08-21 18:57:17,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:17,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:17,515 INFO L87 Difference]: Start difference. First operand 10763 states and 29034 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:17,596 INFO L93 Difference]: Finished difference Result 11930 states and 31286 transitions. [2021-08-21 18:57:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:17,615 INFO L225 Difference]: With dead ends: 11930 [2021-08-21 18:57:17,615 INFO L226 Difference]: Without dead ends: 11918 [2021-08-21 18:57:17,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-08-21 18:57:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 10784. [2021-08-21 18:57:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10784 states, 10783 states have (on average 2.6986923861634056) internal successors, (29100), 10783 states have internal predecessors, (29100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10784 states to 10784 states and 29100 transitions. [2021-08-21 18:57:17,768 INFO L78 Accepts]: Start accepts. Automaton has 10784 states and 29100 transitions. Word has length 32 [2021-08-21 18:57:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 10784 states and 29100 transitions. [2021-08-21 18:57:17,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10784 states and 29100 transitions. [2021-08-21 18:57:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:17,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:17,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:17,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:18,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:18,009 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash -135608449, now seen corresponding path program 4 times [2021-08-21 18:57:18,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:18,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318809139] [2021-08-21 18:57:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:18,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:18,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:18,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318809139] [2021-08-21 18:57:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318809139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:18,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608855770] [2021-08-21 18:57:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:18,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:18,073 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:18,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:57:21,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:21,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608855770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:21,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:21,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:21,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115296910] [2021-08-21 18:57:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:21,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:21,252 INFO L87 Difference]: Start difference. First operand 10784 states and 29100 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:21,351 INFO L93 Difference]: Finished difference Result 12078 states and 31728 transitions. [2021-08-21 18:57:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:21,372 INFO L225 Difference]: With dead ends: 12078 [2021-08-21 18:57:21,372 INFO L226 Difference]: Without dead ends: 12070 [2021-08-21 18:57:21,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12070 states. [2021-08-21 18:57:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12070 to 10802. [2021-08-21 18:57:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10802 states, 10801 states have (on average 2.7011387834459772) internal successors, (29175), 10801 states have internal predecessors, (29175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10802 states to 10802 states and 29175 transitions. [2021-08-21 18:57:21,666 INFO L78 Accepts]: Start accepts. Automaton has 10802 states and 29175 transitions. Word has length 32 [2021-08-21 18:57:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 10802 states and 29175 transitions. [2021-08-21 18:57:21,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10802 states and 29175 transitions. [2021-08-21 18:57:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:21,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:21,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:21,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:21,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:21,897 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 255113403, now seen corresponding path program 4 times [2021-08-21 18:57:21,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:21,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014536673] [2021-08-21 18:57:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:21,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:21,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:21,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014536673] [2021-08-21 18:57:21,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014536673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:21,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409361261] [2021-08-21 18:57:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:21,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:21,950 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:21,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:57:24,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:24,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409361261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:24,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:24,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:24,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392024003] [2021-08-21 18:57:24,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:24,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:24,981 INFO L87 Difference]: Start difference. First operand 10802 states and 29175 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:25,082 INFO L93 Difference]: Finished difference Result 12040 states and 31702 transitions. [2021-08-21 18:57:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:25,102 INFO L225 Difference]: With dead ends: 12040 [2021-08-21 18:57:25,102 INFO L226 Difference]: Without dead ends: 12032 [2021-08-21 18:57:25,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-08-21 18:57:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 10817. [2021-08-21 18:57:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10817 states, 10816 states have (on average 2.702200443786982) internal successors, (29227), 10816 states have internal predecessors, (29227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10817 states to 10817 states and 29227 transitions. [2021-08-21 18:57:25,248 INFO L78 Accepts]: Start accepts. Automaton has 10817 states and 29227 transitions. Word has length 32 [2021-08-21 18:57:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:25,248 INFO L470 AbstractCegarLoop]: Abstraction has 10817 states and 29227 transitions. [2021-08-21 18:57:25,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10817 states and 29227 transitions. [2021-08-21 18:57:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:25,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:25,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:25,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:25,487 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1526668677, now seen corresponding path program 5 times [2021-08-21 18:57:25,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:25,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051194620] [2021-08-21 18:57:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:25,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:25,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:25,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051194620] [2021-08-21 18:57:25,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051194620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:25,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747832883] [2021-08-21 18:57:25,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:25,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:25,549 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:25,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:57:28,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747832883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:28,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:28,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:28,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86019190] [2021-08-21 18:57:28,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:28,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,691 INFO L87 Difference]: Start difference. First operand 10817 states and 29227 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:28,785 INFO L93 Difference]: Finished difference Result 11926 states and 31494 transitions. [2021-08-21 18:57:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:28,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:28,804 INFO L225 Difference]: With dead ends: 11926 [2021-08-21 18:57:28,804 INFO L226 Difference]: Without dead ends: 11918 [2021-08-21 18:57:28,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2021-08-21 18:57:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 10835. [2021-08-21 18:57:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10835 states, 10834 states have (on average 2.703525936865424) internal successors, (29290), 10834 states have internal predecessors, (29290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10835 states to 10835 states and 29290 transitions. [2021-08-21 18:57:28,943 INFO L78 Accepts]: Start accepts. Automaton has 10835 states and 29290 transitions. Word has length 32 [2021-08-21 18:57:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:28,943 INFO L470 AbstractCegarLoop]: Abstraction has 10835 states and 29290 transitions. [2021-08-21 18:57:28,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10835 states and 29290 transitions. [2021-08-21 18:57:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:28,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:28,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:28,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:29,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:29,177 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2143856009, now seen corresponding path program 5 times [2021-08-21 18:57:29,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:29,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936677381] [2021-08-21 18:57:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:29,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:29,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:29,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936677381] [2021-08-21 18:57:29,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936677381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:29,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435837512] [2021-08-21 18:57:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:29,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:29,231 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:29,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 18:57:32,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:32,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:32,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435837512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:32,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:32,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:32,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750818125] [2021-08-21 18:57:32,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:32,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:32,312 INFO L87 Difference]: Start difference. First operand 10835 states and 29290 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:32,404 INFO L93 Difference]: Finished difference Result 11894 states and 31462 transitions. [2021-08-21 18:57:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:32,424 INFO L225 Difference]: With dead ends: 11894 [2021-08-21 18:57:32,424 INFO L226 Difference]: Without dead ends: 11886 [2021-08-21 18:57:32,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-08-21 18:57:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 10853. [2021-08-21 18:57:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 2.7044784371544415) internal successors, (29349), 10852 states have internal predecessors, (29349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 29349 transitions. [2021-08-21 18:57:32,570 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 29349 transitions. Word has length 32 [2021-08-21 18:57:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 10853 states and 29349 transitions. [2021-08-21 18:57:32,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 29349 transitions. [2021-08-21 18:57:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:32,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:32,586 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:32,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:32,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-21 18:57:32,806 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1579494793, now seen corresponding path program 6 times [2021-08-21 18:57:32,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:32,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542930389] [2021-08-21 18:57:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:32,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:32,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542930389] [2021-08-21 18:57:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542930389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727282421] [2021-08-21 18:57:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:32,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:32,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:32,865 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:32,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 18:57:35,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:35,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727282421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:35,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:35,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:35,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978041854] [2021-08-21 18:57:35,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:35,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:35,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:35,998 INFO L87 Difference]: Start difference. First operand 10853 states and 29349 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:36,102 INFO L93 Difference]: Finished difference Result 11918 states and 31522 transitions. [2021-08-21 18:57:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:36,124 INFO L225 Difference]: With dead ends: 11918 [2021-08-21 18:57:36,125 INFO L226 Difference]: Without dead ends: 11910 [2021-08-21 18:57:36,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11910 states. [2021-08-21 18:57:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11910 to 10867. [2021-08-21 18:57:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10867 states, 10866 states have (on average 2.706423706975888) internal successors, (29408), 10866 states have internal predecessors, (29408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10867 states to 10867 states and 29408 transitions. [2021-08-21 18:57:36,284 INFO L78 Accepts]: Start accepts. Automaton has 10867 states and 29408 transitions. Word has length 32 [2021-08-21 18:57:36,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:36,284 INFO L470 AbstractCegarLoop]: Abstraction has 10867 states and 29408 transitions. [2021-08-21 18:57:36,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10867 states and 29408 transitions. [2021-08-21 18:57:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:36,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:36,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:36,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:36,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 18:57:36,517 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:36,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:36,517 INFO L82 PathProgramCache]: Analyzing trace with hash -116557453, now seen corresponding path program 6 times [2021-08-21 18:57:36,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:36,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753785196] [2021-08-21 18:57:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:36,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:36,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:36,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753785196] [2021-08-21 18:57:36,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753785196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:36,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413079565] [2021-08-21 18:57:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:36,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:36,572 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:36,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 18:57:39,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:39,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:39,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413079565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:39,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:39,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:39,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089407571] [2021-08-21 18:57:39,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:39,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:39,813 INFO L87 Difference]: Start difference. First operand 10867 states and 29408 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:39,920 INFO L93 Difference]: Finished difference Result 11876 states and 31474 transitions. [2021-08-21 18:57:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:39,944 INFO L225 Difference]: With dead ends: 11876 [2021-08-21 18:57:39,944 INFO L226 Difference]: Without dead ends: 11868 [2021-08-21 18:57:39,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2021-08-21 18:57:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 10881. [2021-08-21 18:57:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10881 states, 10880 states have (on average 2.7079963235294118) internal successors, (29463), 10880 states have internal predecessors, (29463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10881 states to 10881 states and 29463 transitions. [2021-08-21 18:57:40,107 INFO L78 Accepts]: Start accepts. Automaton has 10881 states and 29463 transitions. Word has length 32 [2021-08-21 18:57:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:40,108 INFO L470 AbstractCegarLoop]: Abstraction has 10881 states and 29463 transitions. [2021-08-21 18:57:40,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 10881 states and 29463 transitions. [2021-08-21 18:57:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:40,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:40,124 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:40,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,341 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1329270043, now seen corresponding path program 3 times [2021-08-21 18:57:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:40,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068745124] [2021-08-21 18:57:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:40,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:40,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:40,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068745124] [2021-08-21 18:57:40,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068745124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732630162] [2021-08-21 18:57:40,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:40,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:40,395 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 18:57:43,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:43,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732630162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:43,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:43,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:43,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489442795] [2021-08-21 18:57:43,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:43,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:43,569 INFO L87 Difference]: Start difference. First operand 10881 states and 29463 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:43,647 INFO L93 Difference]: Finished difference Result 12057 states and 31656 transitions. [2021-08-21 18:57:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:43,668 INFO L225 Difference]: With dead ends: 12057 [2021-08-21 18:57:43,668 INFO L226 Difference]: Without dead ends: 12021 [2021-08-21 18:57:43,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12021 states. [2021-08-21 18:57:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 10938. [2021-08-21 18:57:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10938 states, 10937 states have (on average 2.7031178568163114) internal successors, (29564), 10937 states have internal predecessors, (29564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 29564 transitions. [2021-08-21 18:57:43,824 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 29564 transitions. Word has length 32 [2021-08-21 18:57:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:43,825 INFO L470 AbstractCegarLoop]: Abstraction has 10938 states and 29564 transitions. [2021-08-21 18:57:43,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 29564 transitions. [2021-08-21 18:57:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:43,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:43,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:43,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 18:57:44,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-08-21 18:57:44,066 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1283336047, now seen corresponding path program 3 times [2021-08-21 18:57:44,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:44,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143931031] [2021-08-21 18:57:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:44,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:44,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:44,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143931031] [2021-08-21 18:57:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143931031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:44,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822973862] [2021-08-21 18:57:44,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:44,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:44,122 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:44,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 18:57:47,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:47,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:47,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822973862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:47,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:47,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:47,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975679341] [2021-08-21 18:57:47,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:47,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:47,368 INFO L87 Difference]: Start difference. First operand 10938 states and 29564 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:47,458 INFO L93 Difference]: Finished difference Result 12229 states and 32115 transitions. [2021-08-21 18:57:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:47,479 INFO L225 Difference]: With dead ends: 12229 [2021-08-21 18:57:47,479 INFO L226 Difference]: Without dead ends: 12221 [2021-08-21 18:57:47,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2021-08-21 18:57:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 10987. [2021-08-21 18:57:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10987 states, 10986 states have (on average 2.701711268887675) internal successors, (29681), 10986 states have internal predecessors, (29681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 29681 transitions. [2021-08-21 18:57:47,637 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 29681 transitions. Word has length 32 [2021-08-21 18:57:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:47,637 INFO L470 AbstractCegarLoop]: Abstraction has 10987 states and 29681 transitions. [2021-08-21 18:57:47,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 29681 transitions. [2021-08-21 18:57:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:47,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:47,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:47,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:47,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:47,877 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1674057899, now seen corresponding path program 3 times [2021-08-21 18:57:47,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:47,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687650703] [2021-08-21 18:57:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:47,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:47,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687650703] [2021-08-21 18:57:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687650703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908444361] [2021-08-21 18:57:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:47,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:47,930 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:47,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 18:57:50,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:51,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908444361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:51,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:51,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:51,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394390891] [2021-08-21 18:57:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:51,119 INFO L87 Difference]: Start difference. First operand 10987 states and 29681 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:51,208 INFO L93 Difference]: Finished difference Result 12228 states and 32113 transitions. [2021-08-21 18:57:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:51,230 INFO L225 Difference]: With dead ends: 12228 [2021-08-21 18:57:51,230 INFO L226 Difference]: Without dead ends: 12220 [2021-08-21 18:57:51,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12220 states. [2021-08-21 18:57:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12220 to 11047. [2021-08-21 18:57:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 2.698714466775303) internal successors, (29810), 11046 states have internal predecessors, (29810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 29810 transitions. [2021-08-21 18:57:51,380 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 29810 transitions. Word has length 32 [2021-08-21 18:57:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:51,380 INFO L470 AbstractCegarLoop]: Abstraction has 11047 states and 29810 transitions. [2021-08-21 18:57:51,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 29810 transitions. [2021-08-21 18:57:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:51,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:51,395 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:51,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:51,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-21 18:57:51,619 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1688704983, now seen corresponding path program 3 times [2021-08-21 18:57:51,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:51,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490915391] [2021-08-21 18:57:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:51,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:51,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:51,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490915391] [2021-08-21 18:57:51,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490915391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:51,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349296372] [2021-08-21 18:57:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:51,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:51,674 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:51,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 18:57:54,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:55,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349296372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:55,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:55,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:55,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536118606] [2021-08-21 18:57:55,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:55,095 INFO L87 Difference]: Start difference. First operand 11047 states and 29810 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:55,181 INFO L93 Difference]: Finished difference Result 12229 states and 32096 transitions. [2021-08-21 18:57:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:55,202 INFO L225 Difference]: With dead ends: 12229 [2021-08-21 18:57:55,202 INFO L226 Difference]: Without dead ends: 12217 [2021-08-21 18:57:55,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12217 states. [2021-08-21 18:57:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12217 to 11081. [2021-08-21 18:57:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11081 states, 11080 states have (on average 2.699097472924188) internal successors, (29906), 11080 states have internal predecessors, (29906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11081 states to 11081 states and 29906 transitions. [2021-08-21 18:57:55,352 INFO L78 Accepts]: Start accepts. Automaton has 11081 states and 29906 transitions. Word has length 32 [2021-08-21 18:57:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:55,352 INFO L470 AbstractCegarLoop]: Abstraction has 11081 states and 29906 transitions. [2021-08-21 18:57:55,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 11081 states and 29906 transitions. [2021-08-21 18:57:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:55,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:55,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:55,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:55,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:55,592 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1950648239, now seen corresponding path program 5 times [2021-08-21 18:57:55,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:55,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847949034] [2021-08-21 18:57:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:55,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:55,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:55,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847949034] [2021-08-21 18:57:55,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847949034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:55,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490415734] [2021-08-21 18:57:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:55,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:55,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:55,655 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:55,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 18:57:58,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:58,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490415734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:58,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:58,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:58,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164160818] [2021-08-21 18:57:58,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:58,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:58,905 INFO L87 Difference]: Start difference. First operand 11081 states and 29906 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:58,997 INFO L93 Difference]: Finished difference Result 12188 states and 32139 transitions. [2021-08-21 18:57:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:59,017 INFO L225 Difference]: With dead ends: 12188 [2021-08-21 18:57:59,018 INFO L226 Difference]: Without dead ends: 12180 [2021-08-21 18:57:59,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12180 states. [2021-08-21 18:57:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12180 to 11108. [2021-08-21 18:57:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 2.699288736832628) internal successors, (29981), 11107 states have internal predecessors, (29981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 29981 transitions. [2021-08-21 18:57:59,165 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 29981 transitions. Word has length 32 [2021-08-21 18:57:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 11108 states and 29981 transitions. [2021-08-21 18:57:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 29981 transitions. [2021-08-21 18:57:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:59,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:59,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:59,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:59,401 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:57:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1414421163, now seen corresponding path program 6 times [2021-08-21 18:57:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:59,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805116812] [2021-08-21 18:57:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:59,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:59,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:59,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805116812] [2021-08-21 18:57:59,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805116812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:59,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455950188] [2021-08-21 18:57:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:59,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:59,535 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:59,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 18:58:02,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:58:02,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455950188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:02,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:02,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:02,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026641386] [2021-08-21 18:58:02,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:02,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:02,831 INFO L87 Difference]: Start difference. First operand 11108 states and 29981 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:02,924 INFO L93 Difference]: Finished difference Result 12176 states and 32143 transitions. [2021-08-21 18:58:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:02,945 INFO L225 Difference]: With dead ends: 12176 [2021-08-21 18:58:02,945 INFO L226 Difference]: Without dead ends: 12168 [2021-08-21 18:58:02,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12168 states. [2021-08-21 18:58:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12168 to 11129. [2021-08-21 18:58:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11128 states have (on average 2.7003953989935296) internal successors, (30050), 11128 states have internal predecessors, (30050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 30050 transitions. [2021-08-21 18:58:03,095 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 30050 transitions. Word has length 32 [2021-08-21 18:58:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 11129 states and 30050 transitions. [2021-08-21 18:58:03,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 30050 transitions. [2021-08-21 18:58:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:03,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:03,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:03,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:03,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:03,335 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1094531299, now seen corresponding path program 4 times [2021-08-21 18:58:03,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:03,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504713095] [2021-08-21 18:58:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:03,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:03,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504713095] [2021-08-21 18:58:03,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504713095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743412901] [2021-08-21 18:58:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:03,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:03,389 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:03,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 18:58:06,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:06,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:06,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743412901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:06,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:06,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:06,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712740133] [2021-08-21 18:58:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:06,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:06,865 INFO L87 Difference]: Start difference. First operand 11129 states and 30050 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:06,985 INFO L93 Difference]: Finished difference Result 12440 states and 32702 transitions. [2021-08-21 18:58:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:07,014 INFO L225 Difference]: With dead ends: 12440 [2021-08-21 18:58:07,014 INFO L226 Difference]: Without dead ends: 12432 [2021-08-21 18:58:07,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12432 states. [2021-08-21 18:58:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12432 to 11156. [2021-08-21 18:58:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 2.703272075302555) internal successors, (30155), 11155 states have internal predecessors, (30155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 30155 transitions. [2021-08-21 18:58:07,204 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 30155 transitions. Word has length 32 [2021-08-21 18:58:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:07,205 INFO L470 AbstractCegarLoop]: Abstraction has 11156 states and 30155 transitions. [2021-08-21 18:58:07,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 30155 transitions. [2021-08-21 18:58:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:07,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:07,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:07,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:07,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:07,437 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1485253151, now seen corresponding path program 4 times [2021-08-21 18:58:07,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:07,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277850466] [2021-08-21 18:58:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:07,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:07,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:07,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277850466] [2021-08-21 18:58:07,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277850466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:07,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895058579] [2021-08-21 18:58:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:07,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:07,492 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:07,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 18:58:10,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895058579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:10,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:10,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:10,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366989729] [2021-08-21 18:58:10,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:10,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:10,783 INFO L87 Difference]: Start difference. First operand 11156 states and 30155 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:10,964 INFO L93 Difference]: Finished difference Result 12416 states and 32716 transitions. [2021-08-21 18:58:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:10,983 INFO L225 Difference]: With dead ends: 12416 [2021-08-21 18:58:10,983 INFO L226 Difference]: Without dead ends: 12408 [2021-08-21 18:58:10,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-08-21 18:58:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11181. [2021-08-21 18:58:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.70474060822898) internal successors, (30239), 11180 states have internal predecessors, (30239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 30239 transitions. [2021-08-21 18:58:11,127 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 30239 transitions. Word has length 32 [2021-08-21 18:58:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:11,127 INFO L470 AbstractCegarLoop]: Abstraction has 11181 states and 30239 transitions. [2021-08-21 18:58:11,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 30239 transitions. [2021-08-21 18:58:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:11,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:11,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:11,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:11,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-08-21 18:58:11,357 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:11,357 INFO L82 PathProgramCache]: Analyzing trace with hash -895015137, now seen corresponding path program 5 times [2021-08-21 18:58:11,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:11,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449956962] [2021-08-21 18:58:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:11,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:11,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:11,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449956962] [2021-08-21 18:58:11,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449956962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:11,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891255757] [2021-08-21 18:58:11,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:11,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:11,414 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:11,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 18:58:14,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:14,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:14,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:14,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:14,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891255757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:14,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:14,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:14,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113287717] [2021-08-21 18:58:14,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:14,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:14,770 INFO L87 Difference]: Start difference. First operand 11181 states and 30239 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:14,874 INFO L93 Difference]: Finished difference Result 12326 states and 32574 transitions. [2021-08-21 18:58:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:14,898 INFO L225 Difference]: With dead ends: 12326 [2021-08-21 18:58:14,898 INFO L226 Difference]: Without dead ends: 12318 [2021-08-21 18:58:14,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2021-08-21 18:58:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 11208. [2021-08-21 18:58:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11208 states, 11207 states have (on average 2.705987329347729) internal successors, (30326), 11207 states have internal predecessors, (30326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 30326 transitions. [2021-08-21 18:58:15,054 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 30326 transitions. Word has length 32 [2021-08-21 18:58:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:15,054 INFO L470 AbstractCegarLoop]: Abstraction has 11208 states and 30326 transitions. [2021-08-21 18:58:15,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 30326 transitions. [2021-08-21 18:58:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:15,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:15,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:15,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:15,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 18:58:15,285 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash -83640413, now seen corresponding path program 5 times [2021-08-21 18:58:15,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:15,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603382569] [2021-08-21 18:58:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:15,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:15,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603382569] [2021-08-21 18:58:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603382569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322234798] [2021-08-21 18:58:15,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:15,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:15,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:15,395 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:15,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 18:58:18,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:18,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322234798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:18,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:18,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:18,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448884502] [2021-08-21 18:58:18,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:18,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:18,622 INFO L87 Difference]: Start difference. First operand 11208 states and 30326 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:18,736 INFO L93 Difference]: Finished difference Result 12313 states and 32584 transitions. [2021-08-21 18:58:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:18,757 INFO L225 Difference]: With dead ends: 12313 [2021-08-21 18:58:18,757 INFO L226 Difference]: Without dead ends: 12305 [2021-08-21 18:58:18,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-08-21 18:58:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 11235. [2021-08-21 18:58:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11235 states, 11234 states have (on average 2.7066939647498667) internal successors, (30407), 11234 states have internal predecessors, (30407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 30407 transitions. [2021-08-21 18:58:18,911 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 30407 transitions. Word has length 32 [2021-08-21 18:58:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:18,911 INFO L470 AbstractCegarLoop]: Abstraction has 11235 states and 30407 transitions. [2021-08-21 18:58:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 30407 transitions. [2021-08-21 18:58:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:18,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:18,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:18,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:19,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:19,136 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash -619624541, now seen corresponding path program 6 times [2021-08-21 18:58:19,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:19,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947243534] [2021-08-21 18:58:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:19,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:19,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:19,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947243534] [2021-08-21 18:58:19,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947243534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:19,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472463057] [2021-08-21 18:58:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:19,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:19,217 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 18:58:22,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:58:22,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:22,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472463057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:22,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:22,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:22,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39409186] [2021-08-21 18:58:22,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:22,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:22,696 INFO L87 Difference]: Start difference. First operand 11235 states and 30407 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:22,813 INFO L93 Difference]: Finished difference Result 12326 states and 32623 transitions. [2021-08-21 18:58:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:22,845 INFO L225 Difference]: With dead ends: 12326 [2021-08-21 18:58:22,845 INFO L226 Difference]: Without dead ends: 12318 [2021-08-21 18:58:22,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2021-08-21 18:58:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 11256. [2021-08-21 18:58:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11256 states, 11255 states have (on average 2.7088405153265214) internal successors, (30488), 11255 states have internal predecessors, (30488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11256 states to 11256 states and 30488 transitions. [2021-08-21 18:58:23,046 INFO L78 Accepts]: Start accepts. Automaton has 11256 states and 30488 transitions. Word has length 32 [2021-08-21 18:58:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:23,047 INFO L470 AbstractCegarLoop]: Abstraction has 11256 states and 30488 transitions. [2021-08-21 18:58:23,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 11256 states and 30488 transitions. [2021-08-21 18:58:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:23,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:23,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:23,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 18:58:23,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 18:58:23,281 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 397398311, now seen corresponding path program 6 times [2021-08-21 18:58:23,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:23,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46512670] [2021-08-21 18:58:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:23,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:23,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:23,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46512670] [2021-08-21 18:58:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46512670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:23,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036909607] [2021-08-21 18:58:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:23,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:23,381 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:23,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 18:58:26,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:58:26,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:26,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036909607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:26,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:26,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:26,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990458752] [2021-08-21 18:58:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:26,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:26,801 INFO L87 Difference]: Start difference. First operand 11256 states and 30488 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:26,906 INFO L93 Difference]: Finished difference Result 12298 states and 32609 transitions. [2021-08-21 18:58:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:26,927 INFO L225 Difference]: With dead ends: 12298 [2021-08-21 18:58:26,928 INFO L226 Difference]: Without dead ends: 12290 [2021-08-21 18:58:26,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12290 states. [2021-08-21 18:58:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12290 to 11277. [2021-08-21 18:58:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11277 states, 11276 states have (on average 2.710446967009578) internal successors, (30563), 11276 states have internal predecessors, (30563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11277 states to 11277 states and 30563 transitions. [2021-08-21 18:58:27,091 INFO L78 Accepts]: Start accepts. Automaton has 11277 states and 30563 transitions. Word has length 32 [2021-08-21 18:58:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:27,091 INFO L470 AbstractCegarLoop]: Abstraction has 11277 states and 30563 transitions. [2021-08-21 18:58:27,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11277 states and 30563 transitions. [2021-08-21 18:58:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:27,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:27,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:27,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:27,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 18:58:27,332 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash 332488727, now seen corresponding path program 4 times [2021-08-21 18:58:27,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:27,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534560726] [2021-08-21 18:58:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:27,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:27,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:27,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534560726] [2021-08-21 18:58:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534560726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:27,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124416944] [2021-08-21 18:58:27,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:27,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:27,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:27,390 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:27,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 18:58:30,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:30,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:30,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124416944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:30,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:30,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:30,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838641387] [2021-08-21 18:58:30,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:30,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:30,991 INFO L87 Difference]: Start difference. First operand 11277 states and 30563 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:31,094 INFO L93 Difference]: Finished difference Result 12542 states and 33051 transitions. [2021-08-21 18:58:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:31,118 INFO L225 Difference]: With dead ends: 12542 [2021-08-21 18:58:31,118 INFO L226 Difference]: Without dead ends: 12530 [2021-08-21 18:58:31,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12530 states. [2021-08-21 18:58:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12530 to 11333. [2021-08-21 18:58:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11333 states, 11332 states have (on average 2.7105541828450406) internal successors, (30716), 11332 states have internal predecessors, (30716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11333 states to 11333 states and 30716 transitions. [2021-08-21 18:58:31,272 INFO L78 Accepts]: Start accepts. Automaton has 11333 states and 30716 transitions. Word has length 32 [2021-08-21 18:58:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:31,272 INFO L470 AbstractCegarLoop]: Abstraction has 11333 states and 30716 transitions. [2021-08-21 18:58:31,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 11333 states and 30716 transitions. [2021-08-21 18:58:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:31,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:31,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:31,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:31,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-21 18:58:31,505 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1996642541, now seen corresponding path program 3 times [2021-08-21 18:58:31,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:31,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347913358] [2021-08-21 18:58:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:31,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:31,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:31,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347913358] [2021-08-21 18:58:31,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347913358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:31,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595386343] [2021-08-21 18:58:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:31,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:31,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:31,560 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:31,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 18:58:34,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:58:34,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:34,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595386343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:35,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:35,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:35,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526703162] [2021-08-21 18:58:35,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:35,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:35,129 INFO L87 Difference]: Start difference. First operand 11333 states and 30716 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:35,217 INFO L93 Difference]: Finished difference Result 12505 states and 32971 transitions. [2021-08-21 18:58:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:35,238 INFO L225 Difference]: With dead ends: 12505 [2021-08-21 18:58:35,239 INFO L226 Difference]: Without dead ends: 12493 [2021-08-21 18:58:35,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2021-08-21 18:58:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 11374. [2021-08-21 18:58:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11374 states, 11373 states have (on average 2.7093115273015034) internal successors, (30813), 11373 states have internal predecessors, (30813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11374 states to 11374 states and 30813 transitions. [2021-08-21 18:58:35,402 INFO L78 Accepts]: Start accepts. Automaton has 11374 states and 30813 transitions. Word has length 32 [2021-08-21 18:58:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:35,402 INFO L470 AbstractCegarLoop]: Abstraction has 11374 states and 30813 transitions. [2021-08-21 18:58:35,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 11374 states and 30813 transitions. [2021-08-21 18:58:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:35,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:35,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:35,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:35,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:35,637 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1340325591, now seen corresponding path program 1 times [2021-08-21 18:58:35,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:35,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727013309] [2021-08-21 18:58:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:35,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:35,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:35,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727013309] [2021-08-21 18:58:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727013309] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:58:35,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:58:35,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:58:35,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798927020] [2021-08-21 18:58:35,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:35,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:35,695 INFO L87 Difference]: Start difference. First operand 11374 states and 30813 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:35,791 INFO L93 Difference]: Finished difference Result 12782 states and 33632 transitions. [2021-08-21 18:58:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:35,814 INFO L225 Difference]: With dead ends: 12782 [2021-08-21 18:58:35,814 INFO L226 Difference]: Without dead ends: 12770 [2021-08-21 18:58:35,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12770 states. [2021-08-21 18:58:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12770 to 11455. [2021-08-21 18:58:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11455 states, 11454 states have (on average 2.707874978173564) internal successors, (31016), 11454 states have internal predecessors, (31016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11455 states to 11455 states and 31016 transitions. [2021-08-21 18:58:35,972 INFO L78 Accepts]: Start accepts. Automaton has 11455 states and 31016 transitions. Word has length 32 [2021-08-21 18:58:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:35,972 INFO L470 AbstractCegarLoop]: Abstraction has 11455 states and 31016 transitions. [2021-08-21 18:58:35,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11455 states and 31016 transitions. [2021-08-21 18:58:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:35,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:35,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:35,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-08-21 18:58:35,989 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1633347301, now seen corresponding path program 2 times [2021-08-21 18:58:35,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:35,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204754681] [2021-08-21 18:58:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:35,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:36,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:36,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204754681] [2021-08-21 18:58:36,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204754681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:36,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191186845] [2021-08-21 18:58:36,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:36,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:36,047 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:36,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 18:58:39,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:39,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191186845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:39,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:39,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:39,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900170556] [2021-08-21 18:58:39,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:39,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:39,683 INFO L87 Difference]: Start difference. First operand 11455 states and 31016 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:39,792 INFO L93 Difference]: Finished difference Result 12708 states and 33476 transitions. [2021-08-21 18:58:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:39,816 INFO L225 Difference]: With dead ends: 12708 [2021-08-21 18:58:39,816 INFO L226 Difference]: Without dead ends: 12696 [2021-08-21 18:58:39,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12696 states. [2021-08-21 18:58:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12696 to 11496. [2021-08-21 18:58:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11496 states, 11495 states have (on average 2.708394954327969) internal successors, (31133), 11495 states have internal predecessors, (31133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11496 states to 11496 states and 31133 transitions. [2021-08-21 18:58:39,978 INFO L78 Accepts]: Start accepts. Automaton has 11496 states and 31133 transitions. Word has length 32 [2021-08-21 18:58:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:39,978 INFO L470 AbstractCegarLoop]: Abstraction has 11496 states and 31133 transitions. [2021-08-21 18:58:39,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 11496 states and 31133 transitions. [2021-08-21 18:58:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:39,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:39,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:40,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:40,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:40,215 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:40,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1019168613, now seen corresponding path program 4 times [2021-08-21 18:58:40,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:40,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107379440] [2021-08-21 18:58:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:40,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:40,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:40,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107379440] [2021-08-21 18:58:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107379440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:40,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917342390] [2021-08-21 18:58:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:40,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:40,271 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:40,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 18:58:43,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917342390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:43,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942865783] [2021-08-21 18:58:43,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:43,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:43,841 INFO L87 Difference]: Start difference. First operand 11496 states and 31133 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:43,934 INFO L93 Difference]: Finished difference Result 12709 states and 33481 transitions. [2021-08-21 18:58:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:43,957 INFO L225 Difference]: With dead ends: 12709 [2021-08-21 18:58:43,957 INFO L226 Difference]: Without dead ends: 12697 [2021-08-21 18:58:43,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12697 states. [2021-08-21 18:58:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12697 to 11565. [2021-08-21 18:58:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11565 states, 11564 states have (on average 2.706157039086821) internal successors, (31294), 11564 states have internal predecessors, (31294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11565 states to 11565 states and 31294 transitions. [2021-08-21 18:58:44,111 INFO L78 Accepts]: Start accepts. Automaton has 11565 states and 31294 transitions. Word has length 32 [2021-08-21 18:58:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:44,111 INFO L470 AbstractCegarLoop]: Abstraction has 11565 states and 31294 transitions. [2021-08-21 18:58:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 11565 states and 31294 transitions. [2021-08-21 18:58:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:44,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:44,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:44,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:44,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:44,351 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1815192095, now seen corresponding path program 3 times [2021-08-21 18:58:44,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:44,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88855618] [2021-08-21 18:58:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:44,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:44,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88855618] [2021-08-21 18:58:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88855618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:44,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679927073] [2021-08-21 18:58:44,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:44,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:44,408 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:44,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 18:58:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:58:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679927073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:47,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595512100] [2021-08-21 18:58:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:47,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:47,945 INFO L87 Difference]: Start difference. First operand 11565 states and 31294 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:48,030 INFO L93 Difference]: Finished difference Result 12718 states and 33488 transitions. [2021-08-21 18:58:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:48,051 INFO L225 Difference]: With dead ends: 12718 [2021-08-21 18:58:48,051 INFO L226 Difference]: Without dead ends: 12706 [2021-08-21 18:58:48,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-08-21 18:58:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11620. [2021-08-21 18:58:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11620 states, 11619 states have (on average 2.7032446854290386) internal successors, (31409), 11619 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11620 states to 11620 states and 31409 transitions. [2021-08-21 18:58:48,201 INFO L78 Accepts]: Start accepts. Automaton has 11620 states and 31409 transitions. Word has length 32 [2021-08-21 18:58:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:48,201 INFO L470 AbstractCegarLoop]: Abstraction has 11620 states and 31409 transitions. [2021-08-21 18:58:48,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11620 states and 31409 transitions. [2021-08-21 18:58:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:48,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:48,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:48,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:48,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:48,443 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:48,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1919926677, now seen corresponding path program 5 times [2021-08-21 18:58:48,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:48,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920194650] [2021-08-21 18:58:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:48,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:48,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:48,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920194650] [2021-08-21 18:58:48,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920194650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:48,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581177218] [2021-08-21 18:58:48,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:48,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:48,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:48,500 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:48,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 18:58:52,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:52,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581177218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:52,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:52,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:52,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946992167] [2021-08-21 18:58:52,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:52,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:52,275 INFO L87 Difference]: Start difference. First operand 11620 states and 31409 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:52,393 INFO L93 Difference]: Finished difference Result 12736 states and 33613 transitions. [2021-08-21 18:58:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:52,421 INFO L225 Difference]: With dead ends: 12736 [2021-08-21 18:58:52,421 INFO L226 Difference]: Without dead ends: 12728 [2021-08-21 18:58:52,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12728 states. [2021-08-21 18:58:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12728 to 11656. [2021-08-21 18:58:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11656 states, 11655 states have (on average 2.7026169026169025) internal successors, (31499), 11655 states have internal predecessors, (31499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11656 states to 11656 states and 31499 transitions. [2021-08-21 18:58:52,623 INFO L78 Accepts]: Start accepts. Automaton has 11656 states and 31499 transitions. Word has length 32 [2021-08-21 18:58:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:52,623 INFO L470 AbstractCegarLoop]: Abstraction has 11656 states and 31499 transitions. [2021-08-21 18:58:52,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 11656 states and 31499 transitions. [2021-08-21 18:58:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:52,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:52,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:52,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-21 18:58:52,869 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1417041455, now seen corresponding path program 3 times [2021-08-21 18:58:52,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:52,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348996936] [2021-08-21 18:58:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:52,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:52,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:52,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348996936] [2021-08-21 18:58:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348996936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:52,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635033588] [2021-08-21 18:58:52,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:52,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:52,941 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:52,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 18:58:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:56,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635033588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:56,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:56,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:56,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401891549] [2021-08-21 18:58:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:56,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:56,468 INFO L87 Difference]: Start difference. First operand 11656 states and 31499 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:56,569 INFO L93 Difference]: Finished difference Result 12984 states and 34172 transitions. [2021-08-21 18:58:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:56,593 INFO L225 Difference]: With dead ends: 12984 [2021-08-21 18:58:56,593 INFO L226 Difference]: Without dead ends: 12976 [2021-08-21 18:58:56,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-08-21 18:58:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11701. [2021-08-21 18:58:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11701 states, 11700 states have (on average 2.7046153846153844) internal successors, (31644), 11700 states have internal predecessors, (31644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11701 states to 11701 states and 31644 transitions. [2021-08-21 18:58:56,752 INFO L78 Accepts]: Start accepts. Automaton has 11701 states and 31644 transitions. Word has length 32 [2021-08-21 18:58:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:56,752 INFO L470 AbstractCegarLoop]: Abstraction has 11701 states and 31644 transitions. [2021-08-21 18:58:56,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11701 states and 31644 transitions. [2021-08-21 18:58:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:56,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:56,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:56,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:56,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 18:58:56,985 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:58:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1556631437, now seen corresponding path program 4 times [2021-08-21 18:58:56,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:56,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470702123] [2021-08-21 18:58:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:56,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:58:57,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:57,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470702123] [2021-08-21 18:58:57,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470702123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:57,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894865613] [2021-08-21 18:58:57,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:57,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:57,040 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:57,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 18:59:00,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:00,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894865613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:00,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:00,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:00,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356147414] [2021-08-21 18:59:00,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:00,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:00,577 INFO L87 Difference]: Start difference. First operand 11701 states and 31644 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:00,678 INFO L93 Difference]: Finished difference Result 12879 states and 34029 transitions. [2021-08-21 18:59:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:00,703 INFO L225 Difference]: With dead ends: 12879 [2021-08-21 18:59:00,703 INFO L226 Difference]: Without dead ends: 12871 [2021-08-21 18:59:00,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12871 states. [2021-08-21 18:59:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12871 to 11746. [2021-08-21 18:59:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11746 states, 11745 states have (on average 2.7057471264367816) internal successors, (31779), 11745 states have internal predecessors, (31779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11746 states to 11746 states and 31779 transitions. [2021-08-21 18:59:00,942 INFO L78 Accepts]: Start accepts. Automaton has 11746 states and 31779 transitions. Word has length 32 [2021-08-21 18:59:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:00,942 INFO L470 AbstractCegarLoop]: Abstraction has 11746 states and 31779 transitions. [2021-08-21 18:59:00,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 11746 states and 31779 transitions. [2021-08-21 18:59:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:00,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:00,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:00,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:01,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 18:59:01,173 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1942100975, now seen corresponding path program 6 times [2021-08-21 18:59:01,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:01,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965774930] [2021-08-21 18:59:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:01,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:01,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:01,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965774930] [2021-08-21 18:59:01,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965774930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:01,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605644839] [2021-08-21 18:59:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:01,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:01,227 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:01,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 18:59:04,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605644839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:04,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:04,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:04,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46230162] [2021-08-21 18:59:04,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:04,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:04,895 INFO L87 Difference]: Start difference. First operand 11746 states and 31779 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:04,995 INFO L93 Difference]: Finished difference Result 12829 states and 33924 transitions. [2021-08-21 18:59:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:05,021 INFO L225 Difference]: With dead ends: 12829 [2021-08-21 18:59:05,022 INFO L226 Difference]: Without dead ends: 12821 [2021-08-21 18:59:05,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-08-21 18:59:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 11774. [2021-08-21 18:59:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11774 states, 11773 states have (on average 2.706277074662363) internal successors, (31861), 11773 states have internal predecessors, (31861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11774 states to 11774 states and 31861 transitions. [2021-08-21 18:59:05,192 INFO L78 Accepts]: Start accepts. Automaton has 11774 states and 31861 transitions. Word has length 32 [2021-08-21 18:59:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:05,192 INFO L470 AbstractCegarLoop]: Abstraction has 11774 states and 31861 transitions. [2021-08-21 18:59:05,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 11774 states and 31861 transitions. [2021-08-21 18:59:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:05,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:05,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:05,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:05,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 18:59:05,433 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash -535896653, now seen corresponding path program 3 times [2021-08-21 18:59:05,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:05,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159899651] [2021-08-21 18:59:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:05,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:05,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:05,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159899651] [2021-08-21 18:59:05,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159899651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:05,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033321355] [2021-08-21 18:59:05,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:05,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:05,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:05,490 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:05,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 18:59:09,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:09,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033321355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:09,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:09,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:09,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129480860] [2021-08-21 18:59:09,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:09,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:09,262 INFO L87 Difference]: Start difference. First operand 11774 states and 31861 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:09,371 INFO L93 Difference]: Finished difference Result 13033 states and 34366 transitions. [2021-08-21 18:59:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:09,405 INFO L225 Difference]: With dead ends: 13033 [2021-08-21 18:59:09,405 INFO L226 Difference]: Without dead ends: 13025 [2021-08-21 18:59:09,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13025 states. [2021-08-21 18:59:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13025 to 11810. [2021-08-21 18:59:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11810 states, 11809 states have (on average 2.7076805826064865) internal successors, (31975), 11809 states have internal predecessors, (31975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11810 states to 11810 states and 31975 transitions. [2021-08-21 18:59:09,604 INFO L78 Accepts]: Start accepts. Automaton has 11810 states and 31975 transitions. Word has length 32 [2021-08-21 18:59:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:09,604 INFO L470 AbstractCegarLoop]: Abstraction has 11810 states and 31975 transitions. [2021-08-21 18:59:09,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11810 states and 31975 transitions. [2021-08-21 18:59:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:09,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:09,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:09,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 18:59:09,853 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash 785397751, now seen corresponding path program 4 times [2021-08-21 18:59:09,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:09,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536887238] [2021-08-21 18:59:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:09,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:09,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:09,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536887238] [2021-08-21 18:59:09,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536887238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:09,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170311441] [2021-08-21 18:59:09,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:09,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:09,911 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:09,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 18:59:13,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:13,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170311441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:13,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:13,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435871374] [2021-08-21 18:59:13,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:13,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:13,566 INFO L87 Difference]: Start difference. First operand 11810 states and 31975 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:13,663 INFO L93 Difference]: Finished difference Result 12923 states and 34197 transitions. [2021-08-21 18:59:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:13,685 INFO L225 Difference]: With dead ends: 12923 [2021-08-21 18:59:13,685 INFO L226 Difference]: Without dead ends: 12915 [2021-08-21 18:59:13,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12915 states. [2021-08-21 18:59:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12915 to 11846. [2021-08-21 18:59:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11846 states, 11845 states have (on average 2.7077247783875054) internal successors, (32073), 11845 states have internal predecessors, (32073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11846 states to 11846 states and 32073 transitions. [2021-08-21 18:59:13,848 INFO L78 Accepts]: Start accepts. Automaton has 11846 states and 32073 transitions. Word has length 32 [2021-08-21 18:59:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:13,848 INFO L470 AbstractCegarLoop]: Abstraction has 11846 states and 32073 transitions. [2021-08-21 18:59:13,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11846 states and 32073 transitions. [2021-08-21 18:59:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:13,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:13,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:13,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 18:59:14,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:14,090 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1070842863, now seen corresponding path program 5 times [2021-08-21 18:59:14,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:14,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551040204] [2021-08-21 18:59:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:14,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:14,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:14,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551040204] [2021-08-21 18:59:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551040204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:14,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014932384] [2021-08-21 18:59:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:14,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:14,146 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:14,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 18:59:17,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:17,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:17,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:17,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014932384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:17,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:17,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:17,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801127064] [2021-08-21 18:59:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:17,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:17,837 INFO L87 Difference]: Start difference. First operand 11846 states and 32073 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:17,947 INFO L93 Difference]: Finished difference Result 13158 states and 34694 transitions. [2021-08-21 18:59:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:17,980 INFO L225 Difference]: With dead ends: 13158 [2021-08-21 18:59:17,980 INFO L226 Difference]: Without dead ends: 13150 [2021-08-21 18:59:17,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13150 states. [2021-08-21 18:59:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13150 to 11901. [2021-08-21 18:59:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11901 states, 11900 states have (on average 2.70890756302521) internal successors, (32236), 11900 states have internal predecessors, (32236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11901 states to 11901 states and 32236 transitions. [2021-08-21 18:59:18,181 INFO L78 Accepts]: Start accepts. Automaton has 11901 states and 32236 transitions. Word has length 32 [2021-08-21 18:59:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:18,181 INFO L470 AbstractCegarLoop]: Abstraction has 11901 states and 32236 transitions. [2021-08-21 18:59:18,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11901 states and 32236 transitions. [2021-08-21 18:59:18,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:18,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:18,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:18,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:18,428 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash -389763725, now seen corresponding path program 5 times [2021-08-21 18:59:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:18,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125271313] [2021-08-21 18:59:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:18,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:18,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:18,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125271313] [2021-08-21 18:59:18,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125271313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:18,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142695632] [2021-08-21 18:59:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:18,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:18,486 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:18,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 18:59:22,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:22,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142695632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:22,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:22,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:22,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697032569] [2021-08-21 18:59:22,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:22,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:22,187 INFO L87 Difference]: Start difference. First operand 11901 states and 32236 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:22,302 INFO L93 Difference]: Finished difference Result 13171 states and 34745 transitions. [2021-08-21 18:59:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:22,337 INFO L225 Difference]: With dead ends: 13171 [2021-08-21 18:59:22,337 INFO L226 Difference]: Without dead ends: 13163 [2021-08-21 18:59:22,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13163 states. [2021-08-21 18:59:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13163 to 11941. [2021-08-21 18:59:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.7088777219430487) internal successors, (32344), 11940 states have internal predecessors, (32344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 32344 transitions. [2021-08-21 18:59:22,695 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 32344 transitions. Word has length 32 [2021-08-21 18:59:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:22,695 INFO L470 AbstractCegarLoop]: Abstraction has 11941 states and 32344 transitions. [2021-08-21 18:59:22,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 32344 transitions. [2021-08-21 18:59:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:22,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:22,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:22,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:22,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-08-21 18:59:22,935 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash -924987733, now seen corresponding path program 3 times [2021-08-21 18:59:22,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:22,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808857548] [2021-08-21 18:59:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:22,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:22,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:22,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808857548] [2021-08-21 18:59:22,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808857548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:22,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791300625] [2021-08-21 18:59:22,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:22,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:22,996 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:22,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 18:59:26,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:26,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:26,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791300625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:26,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:26,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:26,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422252373] [2021-08-21 18:59:26,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:26,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:26,757 INFO L87 Difference]: Start difference. First operand 11941 states and 32344 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:26,864 INFO L93 Difference]: Finished difference Result 13283 states and 35056 transitions. [2021-08-21 18:59:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:26,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:26,890 INFO L225 Difference]: With dead ends: 13283 [2021-08-21 18:59:26,891 INFO L226 Difference]: Without dead ends: 13275 [2021-08-21 18:59:26,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13275 states. [2021-08-21 18:59:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13275 to 11985. [2021-08-21 18:59:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 2.7115320427236314) internal successors, (32495), 11984 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 32495 transitions. [2021-08-21 18:59:27,081 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 32495 transitions. Word has length 32 [2021-08-21 18:59:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:27,081 INFO L470 AbstractCegarLoop]: Abstraction has 11985 states and 32495 transitions. [2021-08-21 18:59:27,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 32495 transitions. [2021-08-21 18:59:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:27,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:27,100 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:27,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:27,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 18:59:27,301 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1929203055, now seen corresponding path program 6 times [2021-08-21 18:59:27,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:27,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624012260] [2021-08-21 18:59:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:27,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:27,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624012260] [2021-08-21 18:59:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624012260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788310483] [2021-08-21 18:59:27,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:27,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:27,360 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 18:59:31,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:31,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:31,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788310483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:31,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:31,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:31,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694172479] [2021-08-21 18:59:31,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:31,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:31,158 INFO L87 Difference]: Start difference. First operand 11985 states and 32495 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:31,259 INFO L93 Difference]: Finished difference Result 13066 states and 34672 transitions. [2021-08-21 18:59:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:31,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:31,283 INFO L225 Difference]: With dead ends: 13066 [2021-08-21 18:59:31,284 INFO L226 Difference]: Without dead ends: 13058 [2021-08-21 18:59:31,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13058 states. [2021-08-21 18:59:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13058 to 12020. [2021-08-21 18:59:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 2.713370496713537) internal successors, (32612), 12019 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 32612 transitions. [2021-08-21 18:59:31,459 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 32612 transitions. Word has length 32 [2021-08-21 18:59:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:31,459 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 32612 transitions. [2021-08-21 18:59:31,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 32612 transitions. [2021-08-21 18:59:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:31,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:31,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:31,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:31,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:31,693 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1554389517, now seen corresponding path program 6 times [2021-08-21 18:59:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:31,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200531752] [2021-08-21 18:59:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:31,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:31,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:31,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200531752] [2021-08-21 18:59:31,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200531752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:31,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12465893] [2021-08-21 18:59:31,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:31,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:31,749 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:31,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 18:59:35,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:35,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12465893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:35,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:35,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:35,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237204605] [2021-08-21 18:59:35,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:35,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:35,539 INFO L87 Difference]: Start difference. First operand 12020 states and 32612 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:35,640 INFO L93 Difference]: Finished difference Result 13076 states and 34720 transitions. [2021-08-21 18:59:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:35,663 INFO L225 Difference]: With dead ends: 13076 [2021-08-21 18:59:35,663 INFO L226 Difference]: Without dead ends: 13068 [2021-08-21 18:59:35,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-08-21 18:59:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 12048. [2021-08-21 18:59:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12048 states, 12047 states have (on average 2.7145347389391548) internal successors, (32702), 12047 states have internal predecessors, (32702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 32702 transitions. [2021-08-21 18:59:35,831 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 32702 transitions. Word has length 32 [2021-08-21 18:59:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:35,832 INFO L470 AbstractCegarLoop]: Abstraction has 12048 states and 32702 transitions. [2021-08-21 18:59:35,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 32702 transitions. [2021-08-21 18:59:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:35,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:35,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:35,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 18:59:36,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:36,066 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash -646828753, now seen corresponding path program 5 times [2021-08-21 18:59:36,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:36,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092201105] [2021-08-21 18:59:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:36,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:36,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:36,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092201105] [2021-08-21 18:59:36,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092201105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:36,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118819043] [2021-08-21 18:59:36,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:36,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:36,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:36,131 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:36,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 18:59:39,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118819043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:40,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751564533] [2021-08-21 18:59:40,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:40,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:40,030 INFO L87 Difference]: Start difference. First operand 12048 states and 32702 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:40,134 INFO L93 Difference]: Finished difference Result 13135 states and 34833 transitions. [2021-08-21 18:59:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:40,159 INFO L225 Difference]: With dead ends: 13135 [2021-08-21 18:59:40,159 INFO L226 Difference]: Without dead ends: 13127 [2021-08-21 18:59:40,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-08-21 18:59:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12093. [2021-08-21 18:59:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12093 states, 12092 states have (on average 2.7127026132980485) internal successors, (32802), 12092 states have internal predecessors, (32802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12093 states to 12093 states and 32802 transitions. [2021-08-21 18:59:40,407 INFO L78 Accepts]: Start accepts. Automaton has 12093 states and 32802 transitions. Word has length 32 [2021-08-21 18:59:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:40,407 INFO L470 AbstractCegarLoop]: Abstraction has 12093 states and 32802 transitions. [2021-08-21 18:59:40,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 12093 states and 32802 transitions. [2021-08-21 18:59:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:40,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:40,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:40,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:40,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:40,651 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1769173205, now seen corresponding path program 6 times [2021-08-21 18:59:40,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:40,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542249317] [2021-08-21 18:59:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:40,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:40,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:40,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542249317] [2021-08-21 18:59:40,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542249317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:40,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574561385] [2021-08-21 18:59:40,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:40,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:40,710 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:40,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 18:59:44,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:44,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:59:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574561385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:44,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:44,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:44,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821805222] [2021-08-21 18:59:44,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:44,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:44,475 INFO L87 Difference]: Start difference. First operand 12093 states and 32802 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:44,574 INFO L93 Difference]: Finished difference Result 13108 states and 34781 transitions. [2021-08-21 18:59:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:44,596 INFO L225 Difference]: With dead ends: 13108 [2021-08-21 18:59:44,596 INFO L226 Difference]: Without dead ends: 13100 [2021-08-21 18:59:44,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-08-21 18:59:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 12128. [2021-08-21 18:59:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12128 states, 12127 states have (on average 2.712294879195184) internal successors, (32892), 12127 states have internal predecessors, (32892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12128 states to 12128 states and 32892 transitions. [2021-08-21 18:59:44,771 INFO L78 Accepts]: Start accepts. Automaton has 12128 states and 32892 transitions. Word has length 32 [2021-08-21 18:59:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:44,771 INFO L470 AbstractCegarLoop]: Abstraction has 12128 states and 32892 transitions. [2021-08-21 18:59:44,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12128 states and 32892 transitions. [2021-08-21 18:59:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:44,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:44,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:44,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 18:59:44,993 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 593803179, now seen corresponding path program 3 times [2021-08-21 18:59:44,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:44,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180345381] [2021-08-21 18:59:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:44,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:45,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180345381] [2021-08-21 18:59:45,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180345381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125569959] [2021-08-21 18:59:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:45,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:45,072 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:45,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 18:59:48,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:48,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125569959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:48,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:48,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:48,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204693328] [2021-08-21 18:59:48,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:48,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:48,928 INFO L87 Difference]: Start difference. First operand 12128 states and 32892 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:49,041 INFO L93 Difference]: Finished difference Result 13382 states and 35336 transitions. [2021-08-21 18:59:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:49,075 INFO L225 Difference]: With dead ends: 13382 [2021-08-21 18:59:49,075 INFO L226 Difference]: Without dead ends: 13374 [2021-08-21 18:59:49,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13374 states. [2021-08-21 18:59:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13374 to 12135. [2021-08-21 18:59:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12135 states, 12134 states have (on average 2.712378440745014) internal successors, (32912), 12134 states have internal predecessors, (32912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12135 states to 12135 states and 32912 transitions. [2021-08-21 18:59:49,291 INFO L78 Accepts]: Start accepts. Automaton has 12135 states and 32912 transitions. Word has length 32 [2021-08-21 18:59:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:49,291 INFO L470 AbstractCegarLoop]: Abstraction has 12135 states and 32912 transitions. [2021-08-21 18:59:49,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 12135 states and 32912 transitions. [2021-08-21 18:59:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:49,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:49,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:49,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:49,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 18:59:49,516 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -443803237, now seen corresponding path program 3 times [2021-08-21 18:59:49,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:49,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699585037] [2021-08-21 18:59:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:49,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:49,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:49,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699585037] [2021-08-21 18:59:49,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699585037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:49,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670792695] [2021-08-21 18:59:49,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:49,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:49,600 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:49,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 18:59:53,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:53,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:53,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:53,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670792695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:53,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:53,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:53,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857406857] [2021-08-21 18:59:53,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:53,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:53,673 INFO L87 Difference]: Start difference. First operand 12135 states and 32912 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:53,784 INFO L93 Difference]: Finished difference Result 13332 states and 35301 transitions. [2021-08-21 18:59:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:53,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:53,807 INFO L225 Difference]: With dead ends: 13332 [2021-08-21 18:59:53,807 INFO L226 Difference]: Without dead ends: 13324 [2021-08-21 18:59:53,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13324 states. [2021-08-21 18:59:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13324 to 12151. [2021-08-21 18:59:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12151 states, 12150 states have (on average 2.7146502057613167) internal successors, (32983), 12150 states have internal predecessors, (32983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12151 states to 12151 states and 32983 transitions. [2021-08-21 18:59:54,027 INFO L78 Accepts]: Start accepts. Automaton has 12151 states and 32983 transitions. Word has length 32 [2021-08-21 18:59:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:54,027 INFO L470 AbstractCegarLoop]: Abstraction has 12151 states and 32983 transitions. [2021-08-21 18:59:54,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12151 states and 32983 transitions. [2021-08-21 18:59:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:54,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:54,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:54,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 18:59:54,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:54,269 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:54,269 INFO L82 PathProgramCache]: Analyzing trace with hash -287692257, now seen corresponding path program 1 times [2021-08-21 18:59:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:54,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900015508] [2021-08-21 18:59:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:54,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:54,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:54,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900015508] [2021-08-21 18:59:54,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900015508] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:59:54,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:59:54,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:59:54,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795734992] [2021-08-21 18:59:54,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:54,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:54,325 INFO L87 Difference]: Start difference. First operand 12151 states and 32983 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:54,436 INFO L93 Difference]: Finished difference Result 13566 states and 35765 transitions. [2021-08-21 18:59:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:54,459 INFO L225 Difference]: With dead ends: 13566 [2021-08-21 18:59:54,459 INFO L226 Difference]: Without dead ends: 13554 [2021-08-21 18:59:54,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13554 states. [2021-08-21 18:59:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13554 to 12181. [2021-08-21 18:59:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.7156814449917897) internal successors, (33077), 12180 states have internal predecessors, (33077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 33077 transitions. [2021-08-21 18:59:54,640 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 33077 transitions. Word has length 32 [2021-08-21 18:59:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:54,640 INFO L470 AbstractCegarLoop]: Abstraction has 12181 states and 33077 transitions. [2021-08-21 18:59:54,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 33077 transitions. [2021-08-21 18:59:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:54,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:54,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:54,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-08-21 18:59:54,661 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1403811219, now seen corresponding path program 1 times [2021-08-21 18:59:54,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:54,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965815113] [2021-08-21 18:59:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:54,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:54,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:54,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965815113] [2021-08-21 18:59:54,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965815113] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:59:54,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:59:54,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:59:54,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046913046] [2021-08-21 18:59:54,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:54,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:54,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:54,726 INFO L87 Difference]: Start difference. First operand 12181 states and 33077 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:54,851 INFO L93 Difference]: Finished difference Result 13547 states and 35753 transitions. [2021-08-21 18:59:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:54,876 INFO L225 Difference]: With dead ends: 13547 [2021-08-21 18:59:54,876 INFO L226 Difference]: Without dead ends: 13535 [2021-08-21 18:59:54,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13535 states. [2021-08-21 18:59:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13535 to 12204. [2021-08-21 18:59:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12204 states, 12203 states have (on average 2.7162173236089484) internal successors, (33146), 12203 states have internal predecessors, (33146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12204 states to 12204 states and 33146 transitions. [2021-08-21 18:59:55,056 INFO L78 Accepts]: Start accepts. Automaton has 12204 states and 33146 transitions. Word has length 32 [2021-08-21 18:59:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:55,056 INFO L470 AbstractCegarLoop]: Abstraction has 12204 states and 33146 transitions. [2021-08-21 18:59:55,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 12204 states and 33146 transitions. [2021-08-21 18:59:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:55,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:55,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-08-21 18:59:55,076 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash 48572707, now seen corresponding path program 4 times [2021-08-21 18:59:55,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:55,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277855222] [2021-08-21 18:59:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:55,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:55,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277855222] [2021-08-21 18:59:55,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277855222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:55,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206889143] [2021-08-21 18:59:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:55,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:55,134 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:55,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 18:59:58,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:58,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:58,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:59,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206889143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:59,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:59,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:59,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42495631] [2021-08-21 18:59:59,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:59,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:59,076 INFO L87 Difference]: Start difference. First operand 12204 states and 33146 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:59,191 INFO L93 Difference]: Finished difference Result 13380 states and 35413 transitions. [2021-08-21 18:59:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:59,221 INFO L225 Difference]: With dead ends: 13380 [2021-08-21 18:59:59,221 INFO L226 Difference]: Without dead ends: 13368 [2021-08-21 18:59:59,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13368 states. [2021-08-21 18:59:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13368 to 12219. [2021-08-21 18:59:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 2.7175478801767885) internal successors, (33203), 12218 states have internal predecessors, (33203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 33203 transitions. [2021-08-21 18:59:59,483 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 33203 transitions. Word has length 32 [2021-08-21 18:59:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 12219 states and 33203 transitions. [2021-08-21 18:59:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 33203 transitions. [2021-08-21 18:59:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:59,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:59,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:59,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:59,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-21 18:59:59,729 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 18:59:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -729609453, now seen corresponding path program 4 times [2021-08-21 18:59:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:59,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91226221] [2021-08-21 18:59:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:59,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:59,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:59,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91226221] [2021-08-21 18:59:59,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91226221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:59,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176226331] [2021-08-21 18:59:59,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:59,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:59,802 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:59,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 19:00:03,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:03,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:03,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:04,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176226331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:04,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:04,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:04,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505689950] [2021-08-21 19:00:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:04,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:04,151 INFO L87 Difference]: Start difference. First operand 12219 states and 33203 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:04,278 INFO L93 Difference]: Finished difference Result 13420 states and 35517 transitions. [2021-08-21 19:00:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:04,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:04,310 INFO L225 Difference]: With dead ends: 13420 [2021-08-21 19:00:04,310 INFO L226 Difference]: Without dead ends: 13408 [2021-08-21 19:00:04,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13408 states. [2021-08-21 19:00:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13408 to 12228. [2021-08-21 19:00:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12228 states, 12227 states have (on average 2.718655434693711) internal successors, (33241), 12227 states have internal predecessors, (33241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12228 states to 12228 states and 33241 transitions. [2021-08-21 19:00:04,538 INFO L78 Accepts]: Start accepts. Automaton has 12228 states and 33241 transitions. Word has length 32 [2021-08-21 19:00:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:04,539 INFO L470 AbstractCegarLoop]: Abstraction has 12228 states and 33241 transitions. [2021-08-21 19:00:04,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 12228 states and 33241 transitions. [2021-08-21 19:00:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:04,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:04,563 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:04,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-21 19:00:04,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-21 19:00:04,782 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1904365401, now seen corresponding path program 3 times [2021-08-21 19:00:04,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:04,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849259221] [2021-08-21 19:00:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:04,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:04,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849259221] [2021-08-21 19:00:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849259221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623249725] [2021-08-21 19:00:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:04,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:04,841 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:04,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 19:00:09,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:09,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623249725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:09,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:09,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:09,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698147069] [2021-08-21 19:00:09,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:09,289 INFO L87 Difference]: Start difference. First operand 12228 states and 33241 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:09,517 INFO L93 Difference]: Finished difference Result 13331 states and 35352 transitions. [2021-08-21 19:00:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:09,539 INFO L225 Difference]: With dead ends: 13331 [2021-08-21 19:00:09,539 INFO L226 Difference]: Without dead ends: 13319 [2021-08-21 19:00:09,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13319 states. [2021-08-21 19:00:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13319 to 12237. [2021-08-21 19:00:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12237 states, 12236 states have (on average 2.718944099378882) internal successors, (33269), 12236 states have internal predecessors, (33269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12237 states to 12237 states and 33269 transitions. [2021-08-21 19:00:09,756 INFO L78 Accepts]: Start accepts. Automaton has 12237 states and 33269 transitions. Word has length 32 [2021-08-21 19:00:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:09,756 INFO L470 AbstractCegarLoop]: Abstraction has 12237 states and 33269 transitions. [2021-08-21 19:00:09,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 12237 states and 33269 transitions. [2021-08-21 19:00:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:09,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:09,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:09,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:10,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 19:00:10,009 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1612419735, now seen corresponding path program 3 times [2021-08-21 19:00:10,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:10,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266661791] [2021-08-21 19:00:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:10,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:10,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:10,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266661791] [2021-08-21 19:00:10,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266661791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:10,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822598641] [2021-08-21 19:00:10,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:10,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:10,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:10,067 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:10,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 19:00:13,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:13,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:14,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822598641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:14,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:14,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:14,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928522797] [2021-08-21 19:00:14,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:14,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:14,151 INFO L87 Difference]: Start difference. First operand 12237 states and 33269 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:14,261 INFO L93 Difference]: Finished difference Result 13432 states and 35587 transitions. [2021-08-21 19:00:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:14,284 INFO L225 Difference]: With dead ends: 13432 [2021-08-21 19:00:14,284 INFO L226 Difference]: Without dead ends: 13420 [2021-08-21 19:00:14,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13420 states. [2021-08-21 19:00:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13420 to 12246. [2021-08-21 19:00:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12246 states, 12245 states have (on average 2.7198856676194363) internal successors, (33305), 12245 states have internal predecessors, (33305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12246 states to 12246 states and 33305 transitions. [2021-08-21 19:00:14,463 INFO L78 Accepts]: Start accepts. Automaton has 12246 states and 33305 transitions. Word has length 32 [2021-08-21 19:00:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:14,463 INFO L470 AbstractCegarLoop]: Abstraction has 12246 states and 33305 transitions. [2021-08-21 19:00:14,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 12246 states and 33305 transitions. [2021-08-21 19:00:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:14,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:14,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:14,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:14,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-08-21 19:00:14,697 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -340518373, now seen corresponding path program 2 times [2021-08-21 19:00:14,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:14,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937182167] [2021-08-21 19:00:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:14,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:14,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:14,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937182167] [2021-08-21 19:00:14,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937182167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:14,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036162790] [2021-08-21 19:00:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:14,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:14,759 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:14,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 19:00:18,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:18,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036162790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:18,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:18,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:18,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665764080] [2021-08-21 19:00:18,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:18,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:18,927 INFO L87 Difference]: Start difference. First operand 12246 states and 33305 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:19,038 INFO L93 Difference]: Finished difference Result 13449 states and 35640 transitions. [2021-08-21 19:00:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:19,063 INFO L225 Difference]: With dead ends: 13449 [2021-08-21 19:00:19,063 INFO L226 Difference]: Without dead ends: 13437 [2021-08-21 19:00:19,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13437 states. [2021-08-21 19:00:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13437 to 12255. [2021-08-21 19:00:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12255 states, 12254 states have (on average 2.7206626407703607) internal successors, (33339), 12254 states have internal predecessors, (33339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12255 states to 12255 states and 33339 transitions. [2021-08-21 19:00:19,246 INFO L78 Accepts]: Start accepts. Automaton has 12255 states and 33339 transitions. Word has length 32 [2021-08-21 19:00:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:19,246 INFO L470 AbstractCegarLoop]: Abstraction has 12255 states and 33339 transitions. [2021-08-21 19:00:19,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 12255 states and 33339 transitions. [2021-08-21 19:00:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:19,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:19,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:19,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:19,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:19,481 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2001510815, now seen corresponding path program 2 times [2021-08-21 19:00:19,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:19,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618160267] [2021-08-21 19:00:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:19,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:19,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:19,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618160267] [2021-08-21 19:00:19,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618160267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:19,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780776033] [2021-08-21 19:00:19,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:19,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:19,545 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 19:00:23,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:23,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780776033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:23,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:23,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:23,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192070905] [2021-08-21 19:00:23,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:23,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:23,950 INFO L87 Difference]: Start difference. First operand 12255 states and 33339 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:24,060 INFO L93 Difference]: Finished difference Result 13405 states and 35568 transitions. [2021-08-21 19:00:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:24,091 INFO L225 Difference]: With dead ends: 13405 [2021-08-21 19:00:24,091 INFO L226 Difference]: Without dead ends: 13393 [2021-08-21 19:00:24,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2021-08-21 19:00:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 12262. [2021-08-21 19:00:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12262 states, 12261 states have (on average 2.7206590000815596) internal successors, (33358), 12261 states have internal predecessors, (33358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12262 states to 12262 states and 33358 transitions. [2021-08-21 19:00:24,279 INFO L78 Accepts]: Start accepts. Automaton has 12262 states and 33358 transitions. Word has length 32 [2021-08-21 19:00:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:24,279 INFO L470 AbstractCegarLoop]: Abstraction has 12262 states and 33358 transitions. [2021-08-21 19:00:24,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 12262 states and 33358 transitions. [2021-08-21 19:00:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:24,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:24,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:24,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:24,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:24,525 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 889340191, now seen corresponding path program 4 times [2021-08-21 19:00:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:24,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092284449] [2021-08-21 19:00:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:24,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:24,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:24,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092284449] [2021-08-21 19:00:24,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092284449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:24,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526215966] [2021-08-21 19:00:24,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:24,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:24,590 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:24,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 19:00:28,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:28,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526215966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:28,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:28,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:28,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509680033] [2021-08-21 19:00:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:28,846 INFO L87 Difference]: Start difference. First operand 12262 states and 33358 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:28,975 INFO L93 Difference]: Finished difference Result 13510 states and 35851 transitions. [2021-08-21 19:00:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:28,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:29,008 INFO L225 Difference]: With dead ends: 13510 [2021-08-21 19:00:29,008 INFO L226 Difference]: Without dead ends: 13502 [2021-08-21 19:00:29,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-08-21 19:00:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 12275. [2021-08-21 19:00:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 2.7217695942642983) internal successors, (33407), 12274 states have internal predecessors, (33407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 33407 transitions. [2021-08-21 19:00:29,227 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 33407 transitions. Word has length 32 [2021-08-21 19:00:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:29,227 INFO L470 AbstractCegarLoop]: Abstraction has 12275 states and 33407 transitions. [2021-08-21 19:00:29,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 33407 transitions. [2021-08-21 19:00:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:29,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:29,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:29,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 19:00:29,472 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1720299865, now seen corresponding path program 3 times [2021-08-21 19:00:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513487245] [2021-08-21 19:00:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:29,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513487245] [2021-08-21 19:00:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513487245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267485256] [2021-08-21 19:00:29,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:29,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:29,538 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:29,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 19:00:33,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:33,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:33,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267485256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:33,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:33,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:33,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648872773] [2021-08-21 19:00:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:33,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:33,750 INFO L87 Difference]: Start difference. First operand 12275 states and 33407 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:33,861 INFO L93 Difference]: Finished difference Result 13629 states and 36146 transitions. [2021-08-21 19:00:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:33,884 INFO L225 Difference]: With dead ends: 13629 [2021-08-21 19:00:33,884 INFO L226 Difference]: Without dead ends: 13621 [2021-08-21 19:00:33,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-08-21 19:00:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12313. [2021-08-21 19:00:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 12312 states have (on average 2.7237654320987654) internal successors, (33535), 12312 states have internal predecessors, (33535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 33535 transitions. [2021-08-21 19:00:34,180 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 33535 transitions. Word has length 32 [2021-08-21 19:00:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:34,181 INFO L470 AbstractCegarLoop]: Abstraction has 12313 states and 33535 transitions. [2021-08-21 19:00:34,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 33535 transitions. [2021-08-21 19:00:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:34,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:34,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:34,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 19:00:34,425 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2072483677, now seen corresponding path program 3 times [2021-08-21 19:00:34,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:34,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721310909] [2021-08-21 19:00:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:34,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:34,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721310909] [2021-08-21 19:00:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721310909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120942384] [2021-08-21 19:00:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:34,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:34,484 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:34,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 19:00:39,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:39,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120942384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:39,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:39,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:39,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489316790] [2021-08-21 19:00:39,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:39,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:39,197 INFO L87 Difference]: Start difference. First operand 12313 states and 33535 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:39,301 INFO L93 Difference]: Finished difference Result 13580 states and 36045 transitions. [2021-08-21 19:00:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:39,323 INFO L225 Difference]: With dead ends: 13580 [2021-08-21 19:00:39,324 INFO L226 Difference]: Without dead ends: 13572 [2021-08-21 19:00:39,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13572 states. [2021-08-21 19:00:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13572 to 12329. [2021-08-21 19:00:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12329 states, 12328 states have (on average 2.725016223231668) internal successors, (33594), 12328 states have internal predecessors, (33594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12329 states to 12329 states and 33594 transitions. [2021-08-21 19:00:39,503 INFO L78 Accepts]: Start accepts. Automaton has 12329 states and 33594 transitions. Word has length 32 [2021-08-21 19:00:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:39,503 INFO L470 AbstractCegarLoop]: Abstraction has 12329 states and 33594 transitions. [2021-08-21 19:00:39,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 12329 states and 33594 transitions. [2021-08-21 19:00:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:39,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:39,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:39,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:39,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 19:00:39,743 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1157507937, now seen corresponding path program 1 times [2021-08-21 19:00:39,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:39,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942621047] [2021-08-21 19:00:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:39,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:39,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:39,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942621047] [2021-08-21 19:00:39,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942621047] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:00:39,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:00:39,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:00:39,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998988309] [2021-08-21 19:00:39,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:39,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:39,803 INFO L87 Difference]: Start difference. First operand 12329 states and 33594 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:39,916 INFO L93 Difference]: Finished difference Result 13841 states and 36648 transitions. [2021-08-21 19:00:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:39,940 INFO L225 Difference]: With dead ends: 13841 [2021-08-21 19:00:39,940 INFO L226 Difference]: Without dead ends: 13833 [2021-08-21 19:00:39,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2021-08-21 19:00:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 12366. [2021-08-21 19:00:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12366 states, 12365 states have (on average 2.7278608976951073) internal successors, (33730), 12365 states have internal predecessors, (33730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12366 states to 12366 states and 33730 transitions. [2021-08-21 19:00:40,309 INFO L78 Accepts]: Start accepts. Automaton has 12366 states and 33730 transitions. Word has length 32 [2021-08-21 19:00:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:40,309 INFO L470 AbstractCegarLoop]: Abstraction has 12366 states and 33730 transitions. [2021-08-21 19:00:40,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 12366 states and 33730 transitions. [2021-08-21 19:00:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:40,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:40,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:40,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-08-21 19:00:40,334 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1782220847, now seen corresponding path program 4 times [2021-08-21 19:00:40,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:40,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829537893] [2021-08-21 19:00:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:40,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:40,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:40,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829537893] [2021-08-21 19:00:40,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829537893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:40,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966085316] [2021-08-21 19:00:40,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:40,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:40,607 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:40,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 19:00:45,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966085316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:45,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:45,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:45,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689997993] [2021-08-21 19:00:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:45,275 INFO L87 Difference]: Start difference. First operand 12366 states and 33730 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:45,402 INFO L93 Difference]: Finished difference Result 13671 states and 36393 transitions. [2021-08-21 19:00:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:45,439 INFO L225 Difference]: With dead ends: 13671 [2021-08-21 19:00:45,439 INFO L226 Difference]: Without dead ends: 13663 [2021-08-21 19:00:45,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13663 states. [2021-08-21 19:00:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13663 to 12399. [2021-08-21 19:00:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 2.731408291659945) internal successors, (33864), 12398 states have internal predecessors, (33864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 33864 transitions. [2021-08-21 19:00:45,674 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 33864 transitions. Word has length 32 [2021-08-21 19:00:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:45,675 INFO L470 AbstractCegarLoop]: Abstraction has 12399 states and 33864 transitions. [2021-08-21 19:00:45,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 33864 transitions. [2021-08-21 19:00:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:45,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:45,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:45,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:45,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:45,925 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1004038687, now seen corresponding path program 4 times [2021-08-21 19:00:45,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:45,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8513439] [2021-08-21 19:00:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:45,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:46,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:46,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8513439] [2021-08-21 19:00:46,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8513439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:46,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672464157] [2021-08-21 19:00:46,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:46,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:46,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:46,003 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:46,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 19:00:50,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672464157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:50,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707869394] [2021-08-21 19:00:50,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:50,410 INFO L87 Difference]: Start difference. First operand 12399 states and 33864 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:50,570 INFO L93 Difference]: Finished difference Result 13750 states and 36634 transitions. [2021-08-21 19:00:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:50,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:50,605 INFO L225 Difference]: With dead ends: 13750 [2021-08-21 19:00:50,606 INFO L226 Difference]: Without dead ends: 13742 [2021-08-21 19:00:50,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-08-21 19:00:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 12444. [2021-08-21 19:00:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12444 states, 12443 states have (on average 2.734710278871655) internal successors, (34028), 12443 states have internal predecessors, (34028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 34028 transitions. [2021-08-21 19:00:50,837 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 34028 transitions. Word has length 32 [2021-08-21 19:00:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 12444 states and 34028 transitions. [2021-08-21 19:00:50,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 34028 transitions. [2021-08-21 19:00:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:50,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:50,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:50,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:51,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 19:00:51,077 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash -170717261, now seen corresponding path program 4 times [2021-08-21 19:00:51,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:51,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078124642] [2021-08-21 19:00:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:51,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:51,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:51,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078124642] [2021-08-21 19:00:51,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078124642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:51,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465566991] [2021-08-21 19:00:51,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:51,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:51,141 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:51,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 19:00:55,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465566991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:55,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810671442] [2021-08-21 19:00:55,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:55,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:55,911 INFO L87 Difference]: Start difference. First operand 12444 states and 34028 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:56,019 INFO L93 Difference]: Finished difference Result 13663 states and 36479 transitions. [2021-08-21 19:00:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:56,047 INFO L225 Difference]: With dead ends: 13663 [2021-08-21 19:00:56,047 INFO L226 Difference]: Without dead ends: 13655 [2021-08-21 19:00:56,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13655 states. [2021-08-21 19:00:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13655 to 12453. [2021-08-21 19:00:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12453 states, 12452 states have (on average 2.735946032765821) internal successors, (34068), 12452 states have internal predecessors, (34068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12453 states to 12453 states and 34068 transitions. [2021-08-21 19:00:56,258 INFO L78 Accepts]: Start accepts. Automaton has 12453 states and 34068 transitions. Word has length 32 [2021-08-21 19:00:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:56,258 INFO L470 AbstractCegarLoop]: Abstraction has 12453 states and 34068 transitions. [2021-08-21 19:00:56,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 12453 states and 34068 transitions. [2021-08-21 19:00:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:56,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:56,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:56,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:56,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 19:00:56,509 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:00:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:56,509 INFO L82 PathProgramCache]: Analyzing trace with hash -948899421, now seen corresponding path program 4 times [2021-08-21 19:00:56,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:56,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203911976] [2021-08-21 19:00:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:56,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:56,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:56,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203911976] [2021-08-21 19:00:56,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203911976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:56,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759902042] [2021-08-21 19:00:56,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:56,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:56,569 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:56,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 19:01:00,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:00,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759902042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:00,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:00,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:00,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4827080] [2021-08-21 19:01:00,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:00,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:00,927 INFO L87 Difference]: Start difference. First operand 12453 states and 34068 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:01,069 INFO L93 Difference]: Finished difference Result 13792 states and 36829 transitions. [2021-08-21 19:01:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:01,098 INFO L225 Difference]: With dead ends: 13792 [2021-08-21 19:01:01,098 INFO L226 Difference]: Without dead ends: 13784 [2021-08-21 19:01:01,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13784 states. [2021-08-21 19:01:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13784 to 12489. [2021-08-21 19:01:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12489 states, 12488 states have (on average 2.7391095451633567) internal successors, (34206), 12488 states have internal predecessors, (34206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12489 states to 12489 states and 34206 transitions. [2021-08-21 19:01:01,296 INFO L78 Accepts]: Start accepts. Automaton has 12489 states and 34206 transitions. Word has length 32 [2021-08-21 19:01:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:01,296 INFO L470 AbstractCegarLoop]: Abstraction has 12489 states and 34206 transitions. [2021-08-21 19:01:01,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12489 states and 34206 transitions. [2021-08-21 19:01:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:01,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:01,319 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:01,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:01,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:01,533 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1393129767, now seen corresponding path program 3 times [2021-08-21 19:01:01,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:01,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911689009] [2021-08-21 19:01:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:01,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:01,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:01,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911689009] [2021-08-21 19:01:01,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911689009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:01,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137523902] [2021-08-21 19:01:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:01,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:01,646 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:01,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 19:01:05,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137523902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:05,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:05,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:05,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947224931] [2021-08-21 19:01:05,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:05,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:05,878 INFO L87 Difference]: Start difference. First operand 12489 states and 34206 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:05,994 INFO L93 Difference]: Finished difference Result 13849 states and 37006 transitions. [2021-08-21 19:01:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:06,024 INFO L225 Difference]: With dead ends: 13849 [2021-08-21 19:01:06,024 INFO L226 Difference]: Without dead ends: 13841 [2021-08-21 19:01:06,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13841 states. [2021-08-21 19:01:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13841 to 12534. [2021-08-21 19:01:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12534 states, 12533 states have (on average 2.7409239607436366) internal successors, (34352), 12533 states have internal predecessors, (34352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12534 states to 12534 states and 34352 transitions. [2021-08-21 19:01:06,250 INFO L78 Accepts]: Start accepts. Automaton has 12534 states and 34352 transitions. Word has length 32 [2021-08-21 19:01:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:06,250 INFO L470 AbstractCegarLoop]: Abstraction has 12534 states and 34352 transitions. [2021-08-21 19:01:06,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,250 INFO L276 IsEmpty]: Start isEmpty. Operand 12534 states and 34352 transitions. [2021-08-21 19:01:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:06,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:06,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:06,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-21 19:01:06,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:06,493 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash -559808341, now seen corresponding path program 2 times [2021-08-21 19:01:06,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:06,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070963344] [2021-08-21 19:01:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:06,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:06,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:06,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070963344] [2021-08-21 19:01:06,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070963344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:06,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100244153] [2021-08-21 19:01:06,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:06,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:06,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:06,549 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:06,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 19:01:10,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:10,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:10,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100244153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:10,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:10,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:10,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441887368] [2021-08-21 19:01:10,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:10,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:10,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:10,960 INFO L87 Difference]: Start difference. First operand 12534 states and 34352 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:11,091 INFO L93 Difference]: Finished difference Result 13807 states and 36959 transitions. [2021-08-21 19:01:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:11,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:11,120 INFO L225 Difference]: With dead ends: 13807 [2021-08-21 19:01:11,121 INFO L226 Difference]: Without dead ends: 13799 [2021-08-21 19:01:11,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13799 states. [2021-08-21 19:01:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13799 to 12549. [2021-08-21 19:01:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12549 states, 12548 states have (on average 2.7425087663372647) internal successors, (34413), 12548 states have internal predecessors, (34413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12549 states to 12549 states and 34413 transitions. [2021-08-21 19:01:11,320 INFO L78 Accepts]: Start accepts. Automaton has 12549 states and 34413 transitions. Word has length 32 [2021-08-21 19:01:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:11,320 INFO L470 AbstractCegarLoop]: Abstraction has 12549 states and 34413 transitions. [2021-08-21 19:01:11,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 12549 states and 34413 transitions. [2021-08-21 19:01:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:11,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:11,345 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:11,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:11,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:11,561 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1368116053, now seen corresponding path program 3 times [2021-08-21 19:01:11,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:11,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187188682] [2021-08-21 19:01:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:11,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:11,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:11,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187188682] [2021-08-21 19:01:11,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187188682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:11,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750328369] [2021-08-21 19:01:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:11,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:11,620 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:11,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 19:01:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:16,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750328369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:16,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:16,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952103042] [2021-08-21 19:01:16,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:16,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:16,117 INFO L87 Difference]: Start difference. First operand 12549 states and 34413 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:16,239 INFO L93 Difference]: Finished difference Result 13899 states and 37175 transitions. [2021-08-21 19:01:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:16,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:16,267 INFO L225 Difference]: With dead ends: 13899 [2021-08-21 19:01:16,267 INFO L226 Difference]: Without dead ends: 13891 [2021-08-21 19:01:16,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13891 states. [2021-08-21 19:01:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13891 to 12570. [2021-08-21 19:01:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12570 states, 12569 states have (on average 2.744530193332803) internal successors, (34496), 12569 states have internal predecessors, (34496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12570 states to 12570 states and 34496 transitions. [2021-08-21 19:01:16,469 INFO L78 Accepts]: Start accepts. Automaton has 12570 states and 34496 transitions. Word has length 32 [2021-08-21 19:01:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 12570 states and 34496 transitions. [2021-08-21 19:01:16,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12570 states and 34496 transitions. [2021-08-21 19:01:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:16,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:16,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:16,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:16,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:16,713 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1126586069, now seen corresponding path program 3 times [2021-08-21 19:01:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:16,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182393110] [2021-08-21 19:01:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:16,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:16,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:16,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182393110] [2021-08-21 19:01:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182393110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:16,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111167494] [2021-08-21 19:01:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:16,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:16,773 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:16,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 19:01:21,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:01:21,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:21,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:21,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111167494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:21,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:21,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:21,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343860982] [2021-08-21 19:01:21,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:21,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:21,282 INFO L87 Difference]: Start difference. First operand 12570 states and 34496 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:21,401 INFO L93 Difference]: Finished difference Result 13853 states and 37072 transitions. [2021-08-21 19:01:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:21,429 INFO L225 Difference]: With dead ends: 13853 [2021-08-21 19:01:21,429 INFO L226 Difference]: Without dead ends: 13845 [2021-08-21 19:01:21,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2021-08-21 19:01:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 12597. [2021-08-21 19:01:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12597 states, 12596 states have (on average 2.7457923150206414) internal successors, (34586), 12596 states have internal predecessors, (34586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12597 states to 12597 states and 34586 transitions. [2021-08-21 19:01:21,630 INFO L78 Accepts]: Start accepts. Automaton has 12597 states and 34586 transitions. Word has length 32 [2021-08-21 19:01:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:21,630 INFO L470 AbstractCegarLoop]: Abstraction has 12597 states and 34586 transitions. [2021-08-21 19:01:21,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12597 states and 34586 transitions. [2021-08-21 19:01:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:21,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:21,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:21,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:21,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 19:01:21,860 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1707774639, now seen corresponding path program 3 times [2021-08-21 19:01:21,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:21,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505201037] [2021-08-21 19:01:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:21,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:21,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:21,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505201037] [2021-08-21 19:01:21,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505201037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:21,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043273973] [2021-08-21 19:01:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:21,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:21,933 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:21,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 19:01:26,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:01:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:26,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043273973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:26,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:26,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:26,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102190595] [2021-08-21 19:01:26,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:26,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:26,455 INFO L87 Difference]: Start difference. First operand 12597 states and 34586 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:26,567 INFO L93 Difference]: Finished difference Result 13828 states and 37021 transitions. [2021-08-21 19:01:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:26,596 INFO L225 Difference]: With dead ends: 13828 [2021-08-21 19:01:26,596 INFO L226 Difference]: Without dead ends: 13820 [2021-08-21 19:01:26,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13820 states. [2021-08-21 19:01:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13820 to 12601. [2021-08-21 19:01:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12601 states, 12600 states have (on average 2.74531746031746) internal successors, (34591), 12600 states have internal predecessors, (34591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12601 states to 12601 states and 34591 transitions. [2021-08-21 19:01:26,810 INFO L78 Accepts]: Start accepts. Automaton has 12601 states and 34591 transitions. Word has length 32 [2021-08-21 19:01:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:26,810 INFO L470 AbstractCegarLoop]: Abstraction has 12601 states and 34591 transitions. [2021-08-21 19:01:26,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12601 states and 34591 transitions. [2021-08-21 19:01:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:26,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:26,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:26,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-21 19:01:27,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-21 19:01:27,057 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:27,057 INFO L82 PathProgramCache]: Analyzing trace with hash 648300315, now seen corresponding path program 4 times [2021-08-21 19:01:27,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:27,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354941791] [2021-08-21 19:01:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:27,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:27,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:27,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354941791] [2021-08-21 19:01:27,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354941791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:27,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521038251] [2021-08-21 19:01:27,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:27,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:27,128 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:27,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 19:01:31,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521038251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:31,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322737749] [2021-08-21 19:01:31,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:31,611 INFO L87 Difference]: Start difference. First operand 12601 states and 34591 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:31,730 INFO L93 Difference]: Finished difference Result 13869 states and 37193 transitions. [2021-08-21 19:01:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:31,772 INFO L225 Difference]: With dead ends: 13869 [2021-08-21 19:01:31,772 INFO L226 Difference]: Without dead ends: 13861 [2021-08-21 19:01:31,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13861 states. [2021-08-21 19:01:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13861 to 12623. [2021-08-21 19:01:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12623 states, 12622 states have (on average 2.7474251307241326) internal successors, (34678), 12622 states have internal predecessors, (34678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12623 states to 12623 states and 34678 transitions. [2021-08-21 19:01:31,998 INFO L78 Accepts]: Start accepts. Automaton has 12623 states and 34678 transitions. Word has length 32 [2021-08-21 19:01:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 12623 states and 34678 transitions. [2021-08-21 19:01:31,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 12623 states and 34678 transitions. [2021-08-21 19:01:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:32,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:32,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:32,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:32,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:32,227 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:32,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1485120357, now seen corresponding path program 5 times [2021-08-21 19:01:32,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:32,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484129061] [2021-08-21 19:01:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:32,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:32,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:32,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484129061] [2021-08-21 19:01:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484129061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:32,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127892241] [2021-08-21 19:01:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:32,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:32,287 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:32,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 19:01:36,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:36,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:36,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:36,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127892241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:36,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:36,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:36,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806011288] [2021-08-21 19:01:36,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:36,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:36,800 INFO L87 Difference]: Start difference. First operand 12623 states and 34678 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:36,923 INFO L93 Difference]: Finished difference Result 13685 states and 36878 transitions. [2021-08-21 19:01:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:36,951 INFO L225 Difference]: With dead ends: 13685 [2021-08-21 19:01:36,952 INFO L226 Difference]: Without dead ends: 13677 [2021-08-21 19:01:36,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-08-21 19:01:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 12651. [2021-08-21 19:01:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 2.7500395256916996) internal successors, (34788), 12650 states have internal predecessors, (34788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 34788 transitions. [2021-08-21 19:01:37,151 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 34788 transitions. Word has length 32 [2021-08-21 19:01:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 12651 states and 34788 transitions. [2021-08-21 19:01:37,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 34788 transitions. [2021-08-21 19:01:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:37,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:37,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:37,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:37,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 19:01:37,397 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1635090991, now seen corresponding path program 5 times [2021-08-21 19:01:37,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:37,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697430899] [2021-08-21 19:01:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:37,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:37,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:37,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697430899] [2021-08-21 19:01:37,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697430899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:37,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368791593] [2021-08-21 19:01:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:37,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:37,455 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 19:01:41,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:41,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368791593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:41,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:41,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196306710] [2021-08-21 19:01:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:41,964 INFO L87 Difference]: Start difference. First operand 12651 states and 34788 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:42,076 INFO L93 Difference]: Finished difference Result 13626 states and 36767 transitions. [2021-08-21 19:01:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:42,101 INFO L225 Difference]: With dead ends: 13626 [2021-08-21 19:01:42,102 INFO L226 Difference]: Without dead ends: 13618 [2021-08-21 19:01:42,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13618 states. [2021-08-21 19:01:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13618 to 12660. [2021-08-21 19:01:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 2.75045422229244) internal successors, (34818), 12659 states have internal predecessors, (34818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 34818 transitions. [2021-08-21 19:01:42,324 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 34818 transitions. Word has length 32 [2021-08-21 19:01:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:42,324 INFO L470 AbstractCegarLoop]: Abstraction has 12660 states and 34818 transitions. [2021-08-21 19:01:42,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 34818 transitions. [2021-08-21 19:01:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:42,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:42,349 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:42,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-21 19:01:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-21 19:01:42,573 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 856908831, now seen corresponding path program 5 times [2021-08-21 19:01:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:42,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404689195] [2021-08-21 19:01:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:42,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:42,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:42,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404689195] [2021-08-21 19:01:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404689195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:42,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966346438] [2021-08-21 19:01:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:42,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:42,639 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:42,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 19:01:47,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:47,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:47,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966346438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:47,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:47,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:47,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432807711] [2021-08-21 19:01:47,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:47,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:47,223 INFO L87 Difference]: Start difference. First operand 12660 states and 34818 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:47,342 INFO L93 Difference]: Finished difference Result 13725 states and 37036 transitions. [2021-08-21 19:01:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:47,372 INFO L225 Difference]: With dead ends: 13725 [2021-08-21 19:01:47,372 INFO L226 Difference]: Without dead ends: 13717 [2021-08-21 19:01:47,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13717 states. [2021-08-21 19:01:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13717 to 12687. [2021-08-21 19:01:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12687 states, 12686 states have (on average 2.752246571023175) internal successors, (34915), 12686 states have internal predecessors, (34915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12687 states to 12687 states and 34915 transitions. [2021-08-21 19:01:47,574 INFO L78 Accepts]: Start accepts. Automaton has 12687 states and 34915 transitions. Word has length 32 [2021-08-21 19:01:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:47,574 INFO L470 AbstractCegarLoop]: Abstraction has 12687 states and 34915 transitions. [2021-08-21 19:01:47,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12687 states and 34915 transitions. [2021-08-21 19:01:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:47,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:47,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:47,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:47,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:47,809 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1096029277, now seen corresponding path program 5 times [2021-08-21 19:01:47,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:47,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791762231] [2021-08-21 19:01:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:47,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:48,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:48,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791762231] [2021-08-21 19:01:48,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791762231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:48,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114638192] [2021-08-21 19:01:48,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:48,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:48,025 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:48,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 19:01:52,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:52,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114638192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:52,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:52,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:52,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109151949] [2021-08-21 19:01:52,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:52,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:52,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:52,694 INFO L87 Difference]: Start difference. First operand 12687 states and 34915 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:52,816 INFO L93 Difference]: Finished difference Result 13768 states and 37161 transitions. [2021-08-21 19:01:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:52,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:52,845 INFO L225 Difference]: With dead ends: 13768 [2021-08-21 19:01:52,845 INFO L226 Difference]: Without dead ends: 13760 [2021-08-21 19:01:52,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13760 states. [2021-08-21 19:01:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13760 to 12714. [2021-08-21 19:01:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12714 states, 12713 states have (on average 2.753559348698183) internal successors, (35006), 12713 states have internal predecessors, (35006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12714 states to 12714 states and 35006 transitions. [2021-08-21 19:01:53,043 INFO L78 Accepts]: Start accepts. Automaton has 12714 states and 35006 transitions. Word has length 32 [2021-08-21 19:01:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:53,043 INFO L470 AbstractCegarLoop]: Abstraction has 12714 states and 35006 transitions. [2021-08-21 19:01:53,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12714 states and 35006 transitions. [2021-08-21 19:01:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:53,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:53,065 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:53,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:53,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:53,281 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1245999911, now seen corresponding path program 5 times [2021-08-21 19:01:53,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:53,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455081543] [2021-08-21 19:01:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:53,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:53,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:53,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455081543] [2021-08-21 19:01:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455081543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:53,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090050125] [2021-08-21 19:01:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:53,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:53,342 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:53,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 19:01:57,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090050125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:57,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086084578] [2021-08-21 19:01:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:57,839 INFO L87 Difference]: Start difference. First operand 12714 states and 35006 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:57,952 INFO L93 Difference]: Finished difference Result 13744 states and 37143 transitions. [2021-08-21 19:01:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:57,978 INFO L225 Difference]: With dead ends: 13744 [2021-08-21 19:01:57,978 INFO L226 Difference]: Without dead ends: 13736 [2021-08-21 19:01:57,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13736 states. [2021-08-21 19:01:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13736 to 12732. [2021-08-21 19:01:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12732 states, 12731 states have (on average 2.7546147199748643) internal successors, (35069), 12731 states have internal predecessors, (35069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12732 states to 12732 states and 35069 transitions. [2021-08-21 19:01:58,257 INFO L78 Accepts]: Start accepts. Automaton has 12732 states and 35069 transitions. Word has length 32 [2021-08-21 19:01:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:58,257 INFO L470 AbstractCegarLoop]: Abstraction has 12732 states and 35069 transitions. [2021-08-21 19:01:58,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12732 states and 35069 transitions. [2021-08-21 19:01:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:58,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:58,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:58,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:58,493 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:01:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1716946475, now seen corresponding path program 6 times [2021-08-21 19:01:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:58,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899937636] [2021-08-21 19:01:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:58,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:01:58,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:58,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899937636] [2021-08-21 19:01:58,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899937636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:58,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959253222] [2021-08-21 19:01:58,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:01:58,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:58,555 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:58,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 19:02:03,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:03,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:03,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959253222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:03,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:03,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:03,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078658327] [2021-08-21 19:02:03,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:03,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:03,205 INFO L87 Difference]: Start difference. First operand 12732 states and 35069 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:03,314 INFO L93 Difference]: Finished difference Result 13689 states and 37001 transitions. [2021-08-21 19:02:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:03,339 INFO L225 Difference]: With dead ends: 13689 [2021-08-21 19:02:03,339 INFO L226 Difference]: Without dead ends: 13681 [2021-08-21 19:02:03,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13681 states. [2021-08-21 19:02:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13681 to 12739. [2021-08-21 19:02:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12739 states, 12738 states have (on average 2.7552991050400375) internal successors, (35097), 12738 states have internal predecessors, (35097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12739 states to 12739 states and 35097 transitions. [2021-08-21 19:02:03,647 INFO L78 Accepts]: Start accepts. Automaton has 12739 states and 35097 transitions. Word has length 32 [2021-08-21 19:02:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:03,647 INFO L470 AbstractCegarLoop]: Abstraction has 12739 states and 35097 transitions. [2021-08-21 19:02:03,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12739 states and 35097 transitions. [2021-08-21 19:02:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:03,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:03,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:03,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:03,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:03,885 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1112881951, now seen corresponding path program 6 times [2021-08-21 19:02:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:03,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535054310] [2021-08-21 19:02:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:03,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:03,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:03,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535054310] [2021-08-21 19:02:03,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535054310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:03,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731257166] [2021-08-21 19:02:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:03,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:03,954 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:03,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 19:02:08,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:08,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:08,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731257166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:08,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:08,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:08,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470527143] [2021-08-21 19:02:08,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:08,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:08,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:08,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:08,499 INFO L87 Difference]: Start difference. First operand 12739 states and 35097 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:08,628 INFO L93 Difference]: Finished difference Result 13754 states and 37166 transitions. [2021-08-21 19:02:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:08,659 INFO L225 Difference]: With dead ends: 13754 [2021-08-21 19:02:08,659 INFO L226 Difference]: Without dead ends: 13746 [2021-08-21 19:02:08,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2021-08-21 19:02:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 12760. [2021-08-21 19:02:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12760 states, 12759 states have (on average 2.7582098910572928) internal successors, (35192), 12759 states have internal predecessors, (35192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12760 states to 12760 states and 35192 transitions. [2021-08-21 19:02:08,919 INFO L78 Accepts]: Start accepts. Automaton has 12760 states and 35192 transitions. Word has length 32 [2021-08-21 19:02:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 12760 states and 35192 transitions. [2021-08-21 19:02:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 12760 states and 35192 transitions. [2021-08-21 19:02:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:08,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:08,943 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:08,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:09,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,157 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2057035563, now seen corresponding path program 4 times [2021-08-21 19:02:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386941191] [2021-08-21 19:02:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:09,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:09,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:09,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386941191] [2021-08-21 19:02:09,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386941191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:09,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044472934] [2021-08-21 19:02:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:09,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:09,229 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 19:02:13,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:13,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:13,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044472934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:13,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:13,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:13,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497883143] [2021-08-21 19:02:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:13,965 INFO L87 Difference]: Start difference. First operand 12760 states and 35192 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:14,109 INFO L93 Difference]: Finished difference Result 14069 states and 37871 transitions. [2021-08-21 19:02:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:14,141 INFO L225 Difference]: With dead ends: 14069 [2021-08-21 19:02:14,141 INFO L226 Difference]: Without dead ends: 14061 [2021-08-21 19:02:14,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14061 states. [2021-08-21 19:02:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14061 to 12778. [2021-08-21 19:02:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 2.760820223839712) internal successors, (35275), 12777 states have internal predecessors, (35275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 35275 transitions. [2021-08-21 19:02:14,407 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 35275 transitions. Word has length 32 [2021-08-21 19:02:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:14,408 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 35275 transitions. [2021-08-21 19:02:14,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 35275 transitions. [2021-08-21 19:02:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:14,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:14,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:14,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:14,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:14,653 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1251141057, now seen corresponding path program 5 times [2021-08-21 19:02:14,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:14,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670629494] [2021-08-21 19:02:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:14,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:14,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:14,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670629494] [2021-08-21 19:02:14,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670629494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:14,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728433373] [2021-08-21 19:02:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:14,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:14,759 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:14,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 19:02:19,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:19,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:19,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728433373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:19,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:19,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486671614] [2021-08-21 19:02:19,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:19,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:19,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:19,430 INFO L87 Difference]: Start difference. First operand 12778 states and 35275 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:19,579 INFO L93 Difference]: Finished difference Result 13789 states and 37317 transitions. [2021-08-21 19:02:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:19,605 INFO L225 Difference]: With dead ends: 13789 [2021-08-21 19:02:19,605 INFO L226 Difference]: Without dead ends: 13781 [2021-08-21 19:02:19,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13781 states. [2021-08-21 19:02:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13781 to 12787. [2021-08-21 19:02:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12787 states, 12786 states have (on average 2.7618488972313466) internal successors, (35313), 12786 states have internal predecessors, (35313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12787 states to 12787 states and 35313 transitions. [2021-08-21 19:02:19,898 INFO L78 Accepts]: Start accepts. Automaton has 12787 states and 35313 transitions. Word has length 32 [2021-08-21 19:02:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:19,898 INFO L470 AbstractCegarLoop]: Abstraction has 12787 states and 35313 transitions. [2021-08-21 19:02:19,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12787 states and 35313 transitions. [2021-08-21 19:02:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:19,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:19,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:19,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:20,148 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2029323217, now seen corresponding path program 5 times [2021-08-21 19:02:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:20,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048435403] [2021-08-21 19:02:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:20,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:20,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048435403] [2021-08-21 19:02:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048435403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:20,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733904465] [2021-08-21 19:02:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:20,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:20,356 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:20,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 19:02:24,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733904465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:24,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:24,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:24,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128795406] [2021-08-21 19:02:24,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:24,982 INFO L87 Difference]: Start difference. First operand 12787 states and 35313 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:25,118 INFO L93 Difference]: Finished difference Result 13893 states and 37623 transitions. [2021-08-21 19:02:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:25,157 INFO L225 Difference]: With dead ends: 13893 [2021-08-21 19:02:25,157 INFO L226 Difference]: Without dead ends: 13885 [2021-08-21 19:02:25,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13885 states. [2021-08-21 19:02:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13885 to 12823. [2021-08-21 19:02:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12823 states, 12822 states have (on average 2.7667290594291063) internal successors, (35475), 12822 states have internal predecessors, (35475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12823 states to 12823 states and 35475 transitions. [2021-08-21 19:02:25,374 INFO L78 Accepts]: Start accepts. Automaton has 12823 states and 35475 transitions. Word has length 32 [2021-08-21 19:02:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 12823 states and 35475 transitions. [2021-08-21 19:02:25,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12823 states and 35475 transitions. [2021-08-21 19:02:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:25,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:25,396 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:25,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:25,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 19:02:25,615 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash 312705971, now seen corresponding path program 5 times [2021-08-21 19:02:25,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:25,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343670782] [2021-08-21 19:02:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:25,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:25,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:25,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343670782] [2021-08-21 19:02:25,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343670782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:25,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234348876] [2021-08-21 19:02:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:25,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:25,801 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:25,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 19:02:30,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:30,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234348876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:30,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:30,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:30,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086421057] [2021-08-21 19:02:30,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:30,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:30,498 INFO L87 Difference]: Start difference. First operand 12823 states and 35475 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:30,634 INFO L93 Difference]: Finished difference Result 13951 states and 37836 transitions. [2021-08-21 19:02:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:30,668 INFO L225 Difference]: With dead ends: 13951 [2021-08-21 19:02:30,668 INFO L226 Difference]: Without dead ends: 13943 [2021-08-21 19:02:30,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13943 states. [2021-08-21 19:02:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13943 to 12868. [2021-08-21 19:02:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12868 states, 12867 states have (on average 2.7697987098779824) internal successors, (35639), 12867 states have internal predecessors, (35639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12868 states to 12868 states and 35639 transitions. [2021-08-21 19:02:30,894 INFO L78 Accepts]: Start accepts. Automaton has 12868 states and 35639 transitions. Word has length 32 [2021-08-21 19:02:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:30,894 INFO L470 AbstractCegarLoop]: Abstraction has 12868 states and 35639 transitions. [2021-08-21 19:02:30,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 12868 states and 35639 transitions. [2021-08-21 19:02:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:30,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:30,917 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:30,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-21 19:02:31,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 19:02:31,132 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1640232137, now seen corresponding path program 5 times [2021-08-21 19:02:31,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:31,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234261879] [2021-08-21 19:02:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:31,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:31,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:31,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234261879] [2021-08-21 19:02:31,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234261879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:31,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480029934] [2021-08-21 19:02:31,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:31,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:31,191 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:31,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 19:02:35,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480029934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:35,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230710092] [2021-08-21 19:02:35,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:35,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:35,941 INFO L87 Difference]: Start difference. First operand 12868 states and 35639 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:36,070 INFO L93 Difference]: Finished difference Result 13930 states and 37847 transitions. [2021-08-21 19:02:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:36,099 INFO L225 Difference]: With dead ends: 13930 [2021-08-21 19:02:36,099 INFO L226 Difference]: Without dead ends: 13922 [2021-08-21 19:02:36,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-08-21 19:02:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 12886. [2021-08-21 19:02:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12886 states, 12885 states have (on average 2.772370974000776) internal successors, (35722), 12885 states have internal predecessors, (35722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12886 states to 12886 states and 35722 transitions. [2021-08-21 19:02:36,358 INFO L78 Accepts]: Start accepts. Automaton has 12886 states and 35722 transitions. Word has length 32 [2021-08-21 19:02:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:36,358 INFO L470 AbstractCegarLoop]: Abstraction has 12886 states and 35722 transitions. [2021-08-21 19:02:36,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12886 states and 35722 transitions. [2021-08-21 19:02:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:36,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:36,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:36,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 19:02:36,605 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467733, now seen corresponding path program 6 times [2021-08-21 19:02:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:36,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929562398] [2021-08-21 19:02:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:36,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:36,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:36,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929562398] [2021-08-21 19:02:36,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929562398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:36,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721922564] [2021-08-21 19:02:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:36,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:36,670 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:36,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 19:02:41,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:41,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:41,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721922564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:41,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900312013] [2021-08-21 19:02:41,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:41,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:41,221 INFO L87 Difference]: Start difference. First operand 12886 states and 35722 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:41,362 INFO L93 Difference]: Finished difference Result 13947 states and 37928 transitions. [2021-08-21 19:02:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:41,394 INFO L225 Difference]: With dead ends: 13947 [2021-08-21 19:02:41,394 INFO L226 Difference]: Without dead ends: 13939 [2021-08-21 19:02:41,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2021-08-21 19:02:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 12914. [2021-08-21 19:02:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12914 states, 12913 states have (on average 2.776736622008828) internal successors, (35856), 12913 states have internal predecessors, (35856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12914 states to 12914 states and 35856 transitions. [2021-08-21 19:02:41,604 INFO L78 Accepts]: Start accepts. Automaton has 12914 states and 35856 transitions. Word has length 32 [2021-08-21 19:02:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 12914 states and 35856 transitions. [2021-08-21 19:02:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12914 states and 35856 transitions. [2021-08-21 19:02:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:41,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:41,627 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:41,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:41,850 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash 701342747, now seen corresponding path program 6 times [2021-08-21 19:02:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:41,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844286370] [2021-08-21 19:02:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:41,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:42,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:42,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844286370] [2021-08-21 19:02:42,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844286370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:42,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780704451] [2021-08-21 19:02:42,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:42,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:42,062 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:42,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 19:02:46,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:46,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780704451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:46,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:46,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:46,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930514558] [2021-08-21 19:02:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:46,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:46,599 INFO L87 Difference]: Start difference. First operand 12914 states and 35856 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:46,723 INFO L93 Difference]: Finished difference Result 13903 states and 37853 transitions. [2021-08-21 19:02:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:46,753 INFO L225 Difference]: With dead ends: 13903 [2021-08-21 19:02:46,753 INFO L226 Difference]: Without dead ends: 13895 [2021-08-21 19:02:46,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13895 states. [2021-08-21 19:02:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13895 to 12921. [2021-08-21 19:02:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 2.778018575851393) internal successors, (35892), 12920 states have internal predecessors, (35892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 35892 transitions. [2021-08-21 19:02:46,975 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 35892 transitions. Word has length 32 [2021-08-21 19:02:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:46,975 INFO L470 AbstractCegarLoop]: Abstraction has 12921 states and 35892 transitions. [2021-08-21 19:02:46,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 35892 transitions. [2021-08-21 19:02:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:46,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:46,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:47,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:47,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:47,221 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1935960359, now seen corresponding path program 6 times [2021-08-21 19:02:47,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:47,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304529904] [2021-08-21 19:02:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:47,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:47,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:47,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304529904] [2021-08-21 19:02:47,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304529904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:47,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250558558] [2021-08-21 19:02:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:47,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:47,288 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:47,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 19:02:51,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:51,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:52,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250558558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:52,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:52,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:52,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063697414] [2021-08-21 19:02:52,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:52,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:52,154 INFO L87 Difference]: Start difference. First operand 12921 states and 35892 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:52,295 INFO L93 Difference]: Finished difference Result 13999 states and 38132 transitions. [2021-08-21 19:02:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:52,380 INFO L225 Difference]: With dead ends: 13999 [2021-08-21 19:02:52,380 INFO L226 Difference]: Without dead ends: 13991 [2021-08-21 19:02:52,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13991 states. [2021-08-21 19:02:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13991 to 12956. [2021-08-21 19:02:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12956 states, 12955 states have (on average 2.7814743342338866) internal successors, (36034), 12955 states have internal predecessors, (36034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12956 states to 12956 states and 36034 transitions. [2021-08-21 19:02:52,580 INFO L78 Accepts]: Start accepts. Automaton has 12956 states and 36034 transitions. Word has length 32 [2021-08-21 19:02:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 12956 states and 36034 transitions. [2021-08-21 19:02:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 12956 states and 36034 transitions. [2021-08-21 19:02:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:52,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:52,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:52,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:52,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-21 19:02:52,829 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:52,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1524421155, now seen corresponding path program 6 times [2021-08-21 19:02:52,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:52,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979960598] [2021-08-21 19:02:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:52,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:52,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:52,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979960598] [2021-08-21 19:02:52,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979960598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:52,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973976708] [2021-08-21 19:02:52,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:52,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:52,890 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:52,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 19:02:57,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:57,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:02:57,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973976708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:57,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:57,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:57,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55217693] [2021-08-21 19:02:57,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:57,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:57,650 INFO L87 Difference]: Start difference. First operand 12956 states and 36034 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:57,770 INFO L93 Difference]: Finished difference Result 13981 states and 38147 transitions. [2021-08-21 19:02:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:57,796 INFO L225 Difference]: With dead ends: 13981 [2021-08-21 19:02:57,796 INFO L226 Difference]: Without dead ends: 13973 [2021-08-21 19:02:57,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13973 states. [2021-08-21 19:02:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13973 to 12970. [2021-08-21 19:02:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12969 states have (on average 2.784100547459326) internal successors, (36107), 12969 states have internal predecessors, (36107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 36107 transitions. [2021-08-21 19:02:58,001 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 36107 transitions. Word has length 32 [2021-08-21 19:02:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:58,001 INFO L470 AbstractCegarLoop]: Abstraction has 12970 states and 36107 transitions. [2021-08-21 19:02:58,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 36107 transitions. [2021-08-21 19:02:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:58,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:58,024 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:58,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:58,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:58,249 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:02:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:58,249 INFO L82 PathProgramCache]: Analyzing trace with hash 296116503, now seen corresponding path program 4 times [2021-08-21 19:02:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:58,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362163629] [2021-08-21 19:02:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:58,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:58,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:58,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362163629] [2021-08-21 19:02:58,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362163629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:58,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706261858] [2021-08-21 19:02:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:58,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:58,324 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:58,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 19:03:02,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:02,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:03,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706261858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:03,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:03,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045119346] [2021-08-21 19:03:03,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:03,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:03,096 INFO L87 Difference]: Start difference. First operand 12970 states and 36107 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:03,209 INFO L93 Difference]: Finished difference Result 14177 states and 38570 transitions. [2021-08-21 19:03:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:03,238 INFO L225 Difference]: With dead ends: 14177 [2021-08-21 19:03:03,238 INFO L226 Difference]: Without dead ends: 14169 [2021-08-21 19:03:03,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14169 states. [2021-08-21 19:03:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14169 to 12979. [2021-08-21 19:03:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12979 states, 12978 states have (on average 2.7849437509631683) internal successors, (36143), 12978 states have internal predecessors, (36143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12979 states to 12979 states and 36143 transitions. [2021-08-21 19:03:03,470 INFO L78 Accepts]: Start accepts. Automaton has 12979 states and 36143 transitions. Word has length 32 [2021-08-21 19:03:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:03,470 INFO L470 AbstractCegarLoop]: Abstraction has 12979 states and 36143 transitions. [2021-08-21 19:03:03,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 12979 states and 36143 transitions. [2021-08-21 19:03:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:03,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:03,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:03,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:03,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,701 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 504725019, now seen corresponding path program 5 times [2021-08-21 19:03:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:03,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050053670] [2021-08-21 19:03:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:03,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:03,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:03,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050053670] [2021-08-21 19:03:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050053670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784384365] [2021-08-21 19:03:03,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:03,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:03,764 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:03,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 19:03:08,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:08,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:08,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784384365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:08,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:08,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:08,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528019761] [2021-08-21 19:03:08,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:08,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:08,724 INFO L87 Difference]: Start difference. First operand 12979 states and 36143 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:08,836 INFO L93 Difference]: Finished difference Result 13993 states and 38219 transitions. [2021-08-21 19:03:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:08,862 INFO L225 Difference]: With dead ends: 13993 [2021-08-21 19:03:08,862 INFO L226 Difference]: Without dead ends: 13985 [2021-08-21 19:03:08,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13985 states. [2021-08-21 19:03:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13985 to 12988. [2021-08-21 19:03:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12988 states, 12987 states have (on average 2.785785785785786) internal successors, (36179), 12987 states have internal predecessors, (36179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12988 states to 12988 states and 36179 transitions. [2021-08-21 19:03:09,076 INFO L78 Accepts]: Start accepts. Automaton has 12988 states and 36179 transitions. Word has length 32 [2021-08-21 19:03:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:09,076 INFO L470 AbstractCegarLoop]: Abstraction has 12988 states and 36179 transitions. [2021-08-21 19:03:09,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12988 states and 36179 transitions. [2021-08-21 19:03:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:09,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:09,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:09,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:09,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:09,321 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1448213089, now seen corresponding path program 5 times [2021-08-21 19:03:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:09,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732417217] [2021-08-21 19:03:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:09,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:09,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:09,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732417217] [2021-08-21 19:03:09,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732417217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:09,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557707286] [2021-08-21 19:03:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:09,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:09,386 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:09,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 19:03:13,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:13,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:13,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:14,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557707286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:14,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:14,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:14,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346325309] [2021-08-21 19:03:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:14,138 INFO L87 Difference]: Start difference. First operand 12988 states and 36179 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:14,258 INFO L93 Difference]: Finished difference Result 14012 states and 38276 transitions. [2021-08-21 19:03:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:14,287 INFO L225 Difference]: With dead ends: 14012 [2021-08-21 19:03:14,287 INFO L226 Difference]: Without dead ends: 14004 [2021-08-21 19:03:14,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14004 states. [2021-08-21 19:03:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14004 to 12997. [2021-08-21 19:03:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12997 states, 12996 states have (on average 2.786472760849492) internal successors, (36213), 12996 states have internal predecessors, (36213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 36213 transitions. [2021-08-21 19:03:14,504 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 36213 transitions. Word has length 32 [2021-08-21 19:03:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:14,504 INFO L470 AbstractCegarLoop]: Abstraction has 12997 states and 36213 transitions. [2021-08-21 19:03:14,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 36213 transitions. [2021-08-21 19:03:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:14,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:14,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:14,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:14,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:14,757 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash 893816099, now seen corresponding path program 5 times [2021-08-21 19:03:14,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:14,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943507583] [2021-08-21 19:03:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:14,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:14,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:14,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943507583] [2021-08-21 19:03:14,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943507583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:14,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068621641] [2021-08-21 19:03:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:14,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:14,819 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:14,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 19:03:19,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:19,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:19,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068621641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:19,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:19,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:19,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862860815] [2021-08-21 19:03:19,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:19,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:19,491 INFO L87 Difference]: Start difference. First operand 12997 states and 36213 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:19,608 INFO L93 Difference]: Finished difference Result 13968 states and 38212 transitions. [2021-08-21 19:03:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:19,635 INFO L225 Difference]: With dead ends: 13968 [2021-08-21 19:03:19,636 INFO L226 Difference]: Without dead ends: 13960 [2021-08-21 19:03:19,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13960 states. [2021-08-21 19:03:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13960 to 13006. [2021-08-21 19:03:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13006 states, 13005 states have (on average 2.7870049980776623) internal successors, (36245), 13005 states have internal predecessors, (36245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13006 states to 13006 states and 36245 transitions. [2021-08-21 19:03:19,841 INFO L78 Accepts]: Start accepts. Automaton has 13006 states and 36245 transitions. Word has length 32 [2021-08-21 19:03:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:19,841 INFO L470 AbstractCegarLoop]: Abstraction has 13006 states and 36245 transitions. [2021-08-21 19:03:19,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 13006 states and 36245 transitions. [2021-08-21 19:03:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:19,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:19,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:19,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:20,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 19:03:20,081 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash -780700765, now seen corresponding path program 6 times [2021-08-21 19:03:20,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:20,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041607217] [2021-08-21 19:03:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:20,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:20,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:20,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041607217] [2021-08-21 19:03:20,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041607217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:20,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158731462] [2021-08-21 19:03:20,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:20,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:20,142 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:20,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 19:03:24,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:03:24,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:24,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158731462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:24,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:24,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:24,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869670567] [2021-08-21 19:03:24,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:24,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:24,902 INFO L87 Difference]: Start difference. First operand 13006 states and 36245 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:25,029 INFO L93 Difference]: Finished difference Result 14033 states and 38366 transitions. [2021-08-21 19:03:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:25,055 INFO L225 Difference]: With dead ends: 14033 [2021-08-21 19:03:25,055 INFO L226 Difference]: Without dead ends: 14025 [2021-08-21 19:03:25,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-08-21 19:03:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 13027. [2021-08-21 19:03:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13027 states, 13026 states have (on average 2.7893443881467834) internal successors, (36334), 13026 states have internal predecessors, (36334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13027 states to 13027 states and 36334 transitions. [2021-08-21 19:03:25,360 INFO L78 Accepts]: Start accepts. Automaton has 13027 states and 36334 transitions. Word has length 32 [2021-08-21 19:03:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 13027 states and 36334 transitions. [2021-08-21 19:03:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13027 states and 36334 transitions. [2021-08-21 19:03:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:25,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:25,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:25,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-21 19:03:25,594 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1192239969, now seen corresponding path program 6 times [2021-08-21 19:03:25,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:25,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939929004] [2021-08-21 19:03:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:25,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:25,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:25,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939929004] [2021-08-21 19:03:25,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939929004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:25,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598896255] [2021-08-21 19:03:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:25,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:25,653 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:25,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 19:03:30,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:03:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:30,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:30,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598896255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:30,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:30,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:30,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696983062] [2021-08-21 19:03:30,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:30,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:30,484 INFO L87 Difference]: Start difference. First operand 13027 states and 36334 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:30,607 INFO L93 Difference]: Finished difference Result 14007 states and 38315 transitions. [2021-08-21 19:03:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:30,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:30,636 INFO L225 Difference]: With dead ends: 14007 [2021-08-21 19:03:30,636 INFO L226 Difference]: Without dead ends: 13999 [2021-08-21 19:03:30,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13999 states. [2021-08-21 19:03:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13999 to 13034. [2021-08-21 19:03:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13034 states, 13033 states have (on average 2.7904549988490754) internal successors, (36368), 13033 states have internal predecessors, (36368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13034 states to 13034 states and 36368 transitions. [2021-08-21 19:03:30,854 INFO L78 Accepts]: Start accepts. Automaton has 13034 states and 36368 transitions. Word has length 32 [2021-08-21 19:03:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:30,854 INFO L470 AbstractCegarLoop]: Abstraction has 13034 states and 36368 transitions. [2021-08-21 19:03:30,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 13034 states and 36368 transitions. [2021-08-21 19:03:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:30,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:30,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:30,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:31,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 19:03:31,093 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:31,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1704851751, now seen corresponding path program 4 times [2021-08-21 19:03:31,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:31,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746017639] [2021-08-21 19:03:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:31,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:31,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:31,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746017639] [2021-08-21 19:03:31,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746017639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:31,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030675517] [2021-08-21 19:03:31,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:31,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:31,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:31,152 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:31,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 19:03:35,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:35,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:35,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030675517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:36,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:36,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:36,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482421762] [2021-08-21 19:03:36,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:36,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:36,060 INFO L87 Difference]: Start difference. First operand 13034 states and 36368 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:36,200 INFO L93 Difference]: Finished difference Result 14356 states and 39104 transitions. [2021-08-21 19:03:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:36,238 INFO L225 Difference]: With dead ends: 14356 [2021-08-21 19:03:36,238 INFO L226 Difference]: Without dead ends: 14348 [2021-08-21 19:03:36,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14348 states. [2021-08-21 19:03:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14348 to 13052. [2021-08-21 19:03:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 2.7926595663167575) internal successors, (36447), 13051 states have internal predecessors, (36447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 36447 transitions. [2021-08-21 19:03:36,606 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 36447 transitions. Word has length 32 [2021-08-21 19:03:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:36,607 INFO L470 AbstractCegarLoop]: Abstraction has 13052 states and 36447 transitions. [2021-08-21 19:03:36,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 36447 transitions. [2021-08-21 19:03:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:36,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:36,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:36,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 19:03:36,833 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -39477841, now seen corresponding path program 5 times [2021-08-21 19:03:36,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:36,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382358474] [2021-08-21 19:03:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:36,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:36,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:36,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382358474] [2021-08-21 19:03:36,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382358474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:36,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757519482] [2021-08-21 19:03:36,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:36,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:36,898 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:36,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 19:03:41,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:41,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757519482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:41,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:41,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:41,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285687593] [2021-08-21 19:03:41,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:41,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:41,681 INFO L87 Difference]: Start difference. First operand 13052 states and 36447 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:41,816 INFO L93 Difference]: Finished difference Result 14188 states and 38848 transitions. [2021-08-21 19:03:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:41,848 INFO L225 Difference]: With dead ends: 14188 [2021-08-21 19:03:41,848 INFO L226 Difference]: Without dead ends: 14180 [2021-08-21 19:03:41,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-08-21 19:03:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 13088. [2021-08-21 19:03:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13088 states, 13087 states have (on average 2.7955222740123786) internal successors, (36585), 13087 states have internal predecessors, (36585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13088 states to 13088 states and 36585 transitions. [2021-08-21 19:03:42,061 INFO L78 Accepts]: Start accepts. Automaton has 13088 states and 36585 transitions. Word has length 32 [2021-08-21 19:03:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:42,061 INFO L470 AbstractCegarLoop]: Abstraction has 13088 states and 36585 transitions. [2021-08-21 19:03:42,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13088 states and 36585 transitions. [2021-08-21 19:03:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:42,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:42,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:42,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:42,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-21 19:03:42,305 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1992415949, now seen corresponding path program 5 times [2021-08-21 19:03:42,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:42,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988452429] [2021-08-21 19:03:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:42,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:42,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:42,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988452429] [2021-08-21 19:03:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988452429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:42,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327221329] [2021-08-21 19:03:42,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:42,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:42,375 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 19:03:47,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:47,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327221329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:47,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:47,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032571069] [2021-08-21 19:03:47,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:47,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:47,236 INFO L87 Difference]: Start difference. First operand 13088 states and 36585 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:47,369 INFO L93 Difference]: Finished difference Result 14159 states and 38835 transitions. [2021-08-21 19:03:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:47,399 INFO L225 Difference]: With dead ends: 14159 [2021-08-21 19:03:47,399 INFO L226 Difference]: Without dead ends: 14151 [2021-08-21 19:03:47,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-08-21 19:03:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13106. [2021-08-21 19:03:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13106 states, 13105 states have (on average 2.7977107974055704) internal successors, (36664), 13105 states have internal predecessors, (36664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13106 states to 13106 states and 36664 transitions. [2021-08-21 19:03:47,629 INFO L78 Accepts]: Start accepts. Automaton has 13106 states and 36664 transitions. Word has length 32 [2021-08-21 19:03:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:47,629 INFO L470 AbstractCegarLoop]: Abstraction has 13106 states and 36664 transitions. [2021-08-21 19:03:47,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 13106 states and 36664 transitions. [2021-08-21 19:03:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:47,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:47,655 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:47,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:47,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:47,861 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 42377643, now seen corresponding path program 6 times [2021-08-21 19:03:47,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:47,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444003312] [2021-08-21 19:03:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:47,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:47,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:47,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444003312] [2021-08-21 19:03:47,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444003312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:47,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587808565] [2021-08-21 19:03:47,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:47,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:47,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:47,921 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 19:03:52,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:03:52,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:52,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587808565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:52,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:52,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369235832] [2021-08-21 19:03:52,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:52,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:52,769 INFO L87 Difference]: Start difference. First operand 13106 states and 36664 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:52,902 INFO L93 Difference]: Finished difference Result 14173 states and 38894 transitions. [2021-08-21 19:03:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:52,935 INFO L225 Difference]: With dead ends: 14173 [2021-08-21 19:03:52,935 INFO L226 Difference]: Without dead ends: 14165 [2021-08-21 19:03:52,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-08-21 19:03:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 13134. [2021-08-21 19:03:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13134 states, 13133 states have (on average 2.8007309830198737) internal successors, (36782), 13133 states have internal predecessors, (36782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13134 states to 13134 states and 36782 transitions. [2021-08-21 19:03:53,172 INFO L78 Accepts]: Start accepts. Automaton has 13134 states and 36782 transitions. Word has length 32 [2021-08-21 19:03:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 13134 states and 36782 transitions. [2021-08-21 19:03:53,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13134 states and 36782 transitions. [2021-08-21 19:03:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:53,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:53,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:53,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:53,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-08-21 19:03:53,413 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -369161561, now seen corresponding path program 6 times [2021-08-21 19:03:53,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:53,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73622950] [2021-08-21 19:03:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:53,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:53,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:53,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73622950] [2021-08-21 19:03:53,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73622950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:53,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844869489] [2021-08-21 19:03:53,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:53,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:53,476 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:53,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 19:03:58,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:03:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844869489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:58,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:58,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:58,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049981859] [2021-08-21 19:03:58,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:58,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:58,422 INFO L87 Difference]: Start difference. First operand 13134 states and 36782 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:58,552 INFO L93 Difference]: Finished difference Result 14160 states and 38910 transitions. [2021-08-21 19:03:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:58,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:58,583 INFO L225 Difference]: With dead ends: 14160 [2021-08-21 19:03:58,583 INFO L226 Difference]: Without dead ends: 14152 [2021-08-21 19:03:58,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2021-08-21 19:03:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 13148. [2021-08-21 19:03:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 13147 states have (on average 2.802996881417814) internal successors, (36851), 13147 states have internal predecessors, (36851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 36851 transitions. [2021-08-21 19:03:58,823 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 36851 transitions. Word has length 32 [2021-08-21 19:03:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:58,823 INFO L470 AbstractCegarLoop]: Abstraction has 13148 states and 36851 transitions. [2021-08-21 19:03:58,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 36851 transitions. [2021-08-21 19:03:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:58,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:58,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:58,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:59,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:59,066 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:03:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:59,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1620683815, now seen corresponding path program 6 times [2021-08-21 19:03:59,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:59,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275813055] [2021-08-21 19:03:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:59,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:03:59,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:59,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275813055] [2021-08-21 19:03:59,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275813055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:59,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109672454] [2021-08-21 19:03:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:59,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:59,128 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 19:04:03,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:04,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109672454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:04,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:04,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:04,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630135228] [2021-08-21 19:04:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:04,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:04,060 INFO L87 Difference]: Start difference. First operand 13148 states and 36851 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:04,191 INFO L93 Difference]: Finished difference Result 14193 states and 39013 transitions. [2021-08-21 19:04:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:04,224 INFO L225 Difference]: With dead ends: 14193 [2021-08-21 19:04:04,225 INFO L226 Difference]: Without dead ends: 14185 [2021-08-21 19:04:04,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2021-08-21 19:04:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 13169. [2021-08-21 19:04:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13169 states, 13168 states have (on average 2.8048298906439855) internal successors, (36934), 13168 states have internal predecessors, (36934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13169 states to 13169 states and 36934 transitions. [2021-08-21 19:04:04,484 INFO L78 Accepts]: Start accepts. Automaton has 13169 states and 36934 transitions. Word has length 32 [2021-08-21 19:04:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:04,484 INFO L470 AbstractCegarLoop]: Abstraction has 13169 states and 36934 transitions. [2021-08-21 19:04:04,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 13169 states and 36934 transitions. [2021-08-21 19:04:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:04,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:04,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:04,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:04,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:04,741 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:04,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1209144611, now seen corresponding path program 6 times [2021-08-21 19:04:04,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:04,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287081789] [2021-08-21 19:04:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:04,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:04,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:04,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287081789] [2021-08-21 19:04:04,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287081789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:04,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76604837] [2021-08-21 19:04:04,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:04,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:04,804 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:04,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 19:04:09,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:09,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76604837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:09,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:09,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044638809] [2021-08-21 19:04:09,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:09,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:09,708 INFO L87 Difference]: Start difference. First operand 13169 states and 36934 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:09,832 INFO L93 Difference]: Finished difference Result 14161 states and 38947 transitions. [2021-08-21 19:04:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:09,860 INFO L225 Difference]: With dead ends: 14161 [2021-08-21 19:04:09,860 INFO L226 Difference]: Without dead ends: 14153 [2021-08-21 19:04:09,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-08-21 19:04:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 13176. [2021-08-21 19:04:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13176 states, 13175 states have (on average 2.8057685009487665) internal successors, (36966), 13175 states have internal predecessors, (36966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13176 states to 13176 states and 36966 transitions. [2021-08-21 19:04:10,117 INFO L78 Accepts]: Start accepts. Automaton has 13176 states and 36966 transitions. Word has length 32 [2021-08-21 19:04:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:10,117 INFO L470 AbstractCegarLoop]: Abstraction has 13176 states and 36966 transitions. [2021-08-21 19:04:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13176 states and 36966 transitions. [2021-08-21 19:04:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:10,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:10,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:10,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:10,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:10,373 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1352667939, now seen corresponding path program 4 times [2021-08-21 19:04:10,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:10,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986019179] [2021-08-21 19:04:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:10,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:10,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:10,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986019179] [2021-08-21 19:04:10,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986019179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:10,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707270728] [2021-08-21 19:04:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:10,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:10,436 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:10,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 19:04:14,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:14,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:15,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707270728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:15,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:15,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:15,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692394089] [2021-08-21 19:04:15,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:15,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:15,095 INFO L87 Difference]: Start difference. First operand 13176 states and 36966 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:15,212 INFO L93 Difference]: Finished difference Result 14515 states and 39749 transitions. [2021-08-21 19:04:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:15,242 INFO L225 Difference]: With dead ends: 14515 [2021-08-21 19:04:15,242 INFO L226 Difference]: Without dead ends: 14507 [2021-08-21 19:04:15,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14507 states. [2021-08-21 19:04:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14507 to 13194. [2021-08-21 19:04:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13194 states, 13193 states have (on average 2.807625255817479) internal successors, (37041), 13193 states have internal predecessors, (37041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13194 states to 13194 states and 37041 transitions. [2021-08-21 19:04:15,471 INFO L78 Accepts]: Start accepts. Automaton has 13194 states and 37041 transitions. Word has length 32 [2021-08-21 19:04:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:15,471 INFO L470 AbstractCegarLoop]: Abstraction has 13194 states and 37041 transitions. [2021-08-21 19:04:15,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 13194 states and 37041 transitions. [2021-08-21 19:04:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:15,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:15,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:15,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:15,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:15,720 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1950367535, now seen corresponding path program 5 times [2021-08-21 19:04:15,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:15,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233998277] [2021-08-21 19:04:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:15,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:15,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:15,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233998277] [2021-08-21 19:04:15,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233998277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:15,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275070927] [2021-08-21 19:04:15,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:04:15,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:15,781 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:15,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 19:04:20,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:20,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:20,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275070927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:20,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:20,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:20,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144583841] [2021-08-21 19:04:20,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:20,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:20,851 INFO L87 Difference]: Start difference. First operand 13194 states and 37041 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:20,980 INFO L93 Difference]: Finished difference Result 14276 states and 39307 transitions. [2021-08-21 19:04:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:21,011 INFO L225 Difference]: With dead ends: 14276 [2021-08-21 19:04:21,011 INFO L226 Difference]: Without dead ends: 14268 [2021-08-21 19:04:21,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-08-21 19:04:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 13212. [2021-08-21 19:04:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 2.8094769510256605) internal successors, (37116), 13211 states have internal predecessors, (37116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 37116 transitions. [2021-08-21 19:04:21,241 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 37116 transitions. Word has length 32 [2021-08-21 19:04:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 13212 states and 37116 transitions. [2021-08-21 19:04:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 37116 transitions. [2021-08-21 19:04:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:21,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:21,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-08-21 19:04:21,481 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2032223019, now seen corresponding path program 6 times [2021-08-21 19:04:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:21,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843171208] [2021-08-21 19:04:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:21,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:21,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:21,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843171208] [2021-08-21 19:04:21,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843171208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:21,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240970460] [2021-08-21 19:04:21,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:21,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:21,645 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:21,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 19:04:26,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:26,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:26,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:26,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240970460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:26,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:26,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:26,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211484558] [2021-08-21 19:04:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:26,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:26,842 INFO L87 Difference]: Start difference. First operand 13212 states and 37116 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:26,991 INFO L93 Difference]: Finished difference Result 14247 states and 39261 transitions. [2021-08-21 19:04:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:27,022 INFO L225 Difference]: With dead ends: 14247 [2021-08-21 19:04:27,022 INFO L226 Difference]: Without dead ends: 14239 [2021-08-21 19:04:27,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14239 states. [2021-08-21 19:04:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14239 to 13226. [2021-08-21 19:04:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 13225 states have (on average 2.8114177693761815) internal successors, (37181), 13225 states have internal predecessors, (37181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 37181 transitions. [2021-08-21 19:04:27,227 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 37181 transitions. Word has length 32 [2021-08-21 19:04:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:27,227 INFO L470 AbstractCegarLoop]: Abstraction has 13226 states and 37181 transitions. [2021-08-21 19:04:27,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 37181 transitions. [2021-08-21 19:04:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:27,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:27,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:27,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:27,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 19:04:27,473 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1000484127, now seen corresponding path program 3 times [2021-08-21 19:04:27,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:27,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926335980] [2021-08-21 19:04:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:27,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:27,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:27,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926335980] [2021-08-21 19:04:27,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926335980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:27,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194267128] [2021-08-21 19:04:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:04:27,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:27,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:27,543 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:27,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 19:04:32,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:04:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194267128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:32,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:32,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:32,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098236498] [2021-08-21 19:04:32,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:32,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:32,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:32,564 INFO L87 Difference]: Start difference. First operand 13226 states and 37181 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:32,682 INFO L93 Difference]: Finished difference Result 14510 states and 39852 transitions. [2021-08-21 19:04:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:32,712 INFO L225 Difference]: With dead ends: 14510 [2021-08-21 19:04:32,712 INFO L226 Difference]: Without dead ends: 14502 [2021-08-21 19:04:32,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-08-21 19:04:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 13240. [2021-08-21 19:04:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 2.8121459324722413) internal successors, (37230), 13239 states have internal predecessors, (37230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 37230 transitions. [2021-08-21 19:04:32,986 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 37230 transitions. Word has length 32 [2021-08-21 19:04:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:32,987 INFO L470 AbstractCegarLoop]: Abstraction has 13240 states and 37230 transitions. [2021-08-21 19:04:32,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 37230 transitions. [2021-08-21 19:04:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:33,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:33,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:33,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:33,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:33,237 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:33,237 INFO L82 PathProgramCache]: Analyzing trace with hash -272898901, now seen corresponding path program 6 times [2021-08-21 19:04:33,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:33,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122599269] [2021-08-21 19:04:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:33,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:33,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:33,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122599269] [2021-08-21 19:04:33,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122599269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:33,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108521801] [2021-08-21 19:04:33,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:33,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:33,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:33,299 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:33,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 19:04:38,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:38,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:38,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108521801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:38,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:38,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:38,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358016118] [2021-08-21 19:04:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:38,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:38,515 INFO L87 Difference]: Start difference. First operand 13240 states and 37230 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:38,633 INFO L93 Difference]: Finished difference Result 14218 states and 39260 transitions. [2021-08-21 19:04:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:38,660 INFO L225 Difference]: With dead ends: 14218 [2021-08-21 19:04:38,660 INFO L226 Difference]: Without dead ends: 14210 [2021-08-21 19:04:38,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14210 states. [2021-08-21 19:04:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14210 to 13254. [2021-08-21 19:04:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13254 states, 13253 states have (on average 2.8134761940692674) internal successors, (37287), 13253 states have internal predecessors, (37287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13254 states to 13254 states and 37287 transitions. [2021-08-21 19:04:38,997 INFO L78 Accepts]: Start accepts. Automaton has 13254 states and 37287 transitions. Word has length 32 [2021-08-21 19:04:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:38,997 INFO L470 AbstractCegarLoop]: Abstraction has 13254 states and 37287 transitions. [2021-08-21 19:04:38,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13254 states and 37287 transitions. [2021-08-21 19:04:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:39,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:39,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:39,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:39,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 19:04:39,249 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -684438105, now seen corresponding path program 6 times [2021-08-21 19:04:39,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:39,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551720646] [2021-08-21 19:04:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:39,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:39,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:39,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551720646] [2021-08-21 19:04:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551720646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:39,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392844976] [2021-08-21 19:04:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:39,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:39,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:39,343 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:39,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 19:04:44,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:44,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:44,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392844976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:44,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:44,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:44,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895779811] [2021-08-21 19:04:44,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:44,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:44,554 INFO L87 Difference]: Start difference. First operand 13254 states and 37287 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:44,700 INFO L93 Difference]: Finished difference Result 14199 states and 39224 transitions. [2021-08-21 19:04:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:44,734 INFO L225 Difference]: With dead ends: 14199 [2021-08-21 19:04:44,735 INFO L226 Difference]: Without dead ends: 14191 [2021-08-21 19:04:44,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14191 states. [2021-08-21 19:04:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14191 to 13261. [2021-08-21 19:04:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13261 states, 13260 states have (on average 2.8142533936651586) internal successors, (37317), 13260 states have internal predecessors, (37317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13261 states to 13261 states and 37317 transitions. [2021-08-21 19:04:45,087 INFO L78 Accepts]: Start accepts. Automaton has 13261 states and 37317 transitions. Word has length 32 [2021-08-21 19:04:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:45,087 INFO L470 AbstractCegarLoop]: Abstraction has 13261 states and 37317 transitions. [2021-08-21 19:04:45,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 13261 states and 37317 transitions. [2021-08-21 19:04:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:45,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:45,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:45,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-21 19:04:45,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:45,318 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash -392190183, now seen corresponding path program 7 times [2021-08-21 19:04:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:45,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012038638] [2021-08-21 19:04:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:45,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:45,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:45,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012038638] [2021-08-21 19:04:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012038638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:45,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668328921] [2021-08-21 19:04:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:04:45,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:45,416 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:45,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 19:04:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:04:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:50,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668328921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:50,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:50,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:04:50,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748615146] [2021-08-21 19:04:50,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:50,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:50,730 INFO L87 Difference]: Start difference. First operand 13261 states and 37317 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:50,866 INFO L93 Difference]: Finished difference Result 15081 states and 41043 transitions. [2021-08-21 19:04:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:50,896 INFO L225 Difference]: With dead ends: 15081 [2021-08-21 19:04:50,896 INFO L226 Difference]: Without dead ends: 15073 [2021-08-21 19:04:50,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-08-21 19:04:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 13204. [2021-08-21 19:04:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13204 states, 13203 states have (on average 2.8109520563508292) internal successors, (37113), 13203 states have internal predecessors, (37113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13204 states to 13204 states and 37113 transitions. [2021-08-21 19:04:51,121 INFO L78 Accepts]: Start accepts. Automaton has 13204 states and 37113 transitions. Word has length 35 [2021-08-21 19:04:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:51,121 INFO L470 AbstractCegarLoop]: Abstraction has 13204 states and 37113 transitions. [2021-08-21 19:04:51,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 13204 states and 37113 transitions. [2021-08-21 19:04:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:51,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:51,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:51,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:51,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-21 19:04:51,365 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1943843993, now seen corresponding path program 1 times [2021-08-21 19:04:51,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:51,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217164877] [2021-08-21 19:04:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:51,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:04:51,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:51,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217164877] [2021-08-21 19:04:51,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217164877] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:51,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:51,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:04:51,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423524917] [2021-08-21 19:04:51,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:51,439 INFO L87 Difference]: Start difference. First operand 13204 states and 37113 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:51,572 INFO L93 Difference]: Finished difference Result 15189 states and 41192 transitions. [2021-08-21 19:04:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:51,603 INFO L225 Difference]: With dead ends: 15189 [2021-08-21 19:04:51,603 INFO L226 Difference]: Without dead ends: 15177 [2021-08-21 19:04:51,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15177 states. [2021-08-21 19:04:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15177 to 13248. [2021-08-21 19:04:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 13247 states have (on average 2.8119574243224883) internal successors, (37250), 13247 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 37250 transitions. [2021-08-21 19:04:51,840 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 37250 transitions. Word has length 35 [2021-08-21 19:04:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:51,840 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 37250 transitions. [2021-08-21 19:04:51,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 37250 transitions. [2021-08-21 19:04:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:51,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:51,995 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:51,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2021-08-21 19:04:51,995 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1897909997, now seen corresponding path program 1 times [2021-08-21 19:04:51,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:51,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031145786] [2021-08-21 19:04:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:51,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:04:52,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:52,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031145786] [2021-08-21 19:04:52,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031145786] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:52,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:52,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:04:52,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696175156] [2021-08-21 19:04:52,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:52,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:52,073 INFO L87 Difference]: Start difference. First operand 13248 states and 37250 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:52,218 INFO L93 Difference]: Finished difference Result 15266 states and 41375 transitions. [2021-08-21 19:04:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:52,250 INFO L225 Difference]: With dead ends: 15266 [2021-08-21 19:04:52,250 INFO L226 Difference]: Without dead ends: 15258 [2021-08-21 19:04:52,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15258 states. [2021-08-21 19:04:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15258 to 13198. [2021-08-21 19:04:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13198 states, 13197 states have (on average 2.8064711676896263) internal successors, (37037), 13197 states have internal predecessors, (37037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13198 states to 13198 states and 37037 transitions. [2021-08-21 19:04:52,459 INFO L78 Accepts]: Start accepts. Automaton has 13198 states and 37037 transitions. Word has length 35 [2021-08-21 19:04:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:52,460 INFO L470 AbstractCegarLoop]: Abstraction has 13198 states and 37037 transitions. [2021-08-21 19:04:52,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 13198 states and 37037 transitions. [2021-08-21 19:04:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:52,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:52,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:52,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-08-21 19:04:52,481 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2006335447, now seen corresponding path program 1 times [2021-08-21 19:04:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:52,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214003423] [2021-08-21 19:04:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:52,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:04:52,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:52,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214003423] [2021-08-21 19:04:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214003423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:52,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:52,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:04:52,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453291600] [2021-08-21 19:04:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:52,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:52,565 INFO L87 Difference]: Start difference. First operand 13198 states and 37037 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:52,696 INFO L93 Difference]: Finished difference Result 15129 states and 40974 transitions. [2021-08-21 19:04:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:52,723 INFO L225 Difference]: With dead ends: 15129 [2021-08-21 19:04:52,723 INFO L226 Difference]: Without dead ends: 15121 [2021-08-21 19:04:52,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15121 states. [2021-08-21 19:04:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15121 to 13160. [2021-08-21 19:04:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 2.802492590622388) internal successors, (36878), 13159 states have internal predecessors, (36878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 36878 transitions. [2021-08-21 19:04:53,134 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 36878 transitions. Word has length 35 [2021-08-21 19:04:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:53,134 INFO L470 AbstractCegarLoop]: Abstraction has 13160 states and 36878 transitions. [2021-08-21 19:04:53,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 36878 transitions. [2021-08-21 19:04:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:53,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:53,162 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:53,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-08-21 19:04:53,162 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash 215568681, now seen corresponding path program 1 times [2021-08-21 19:04:53,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:53,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820596583] [2021-08-21 19:04:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:53,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:04:53,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:53,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820596583] [2021-08-21 19:04:53,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820596583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:53,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:53,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:04:53,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393775432] [2021-08-21 19:04:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:53,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:53,266 INFO L87 Difference]: Start difference. First operand 13160 states and 36878 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:53,449 INFO L93 Difference]: Finished difference Result 15056 states and 40613 transitions. [2021-08-21 19:04:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:53,480 INFO L225 Difference]: With dead ends: 15056 [2021-08-21 19:04:53,480 INFO L226 Difference]: Without dead ends: 15048 [2021-08-21 19:04:53,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15048 states. [2021-08-21 19:04:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15048 to 13113. [2021-08-21 19:04:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13113 states, 13112 states have (on average 2.793319097010372) internal successors, (36626), 13112 states have internal predecessors, (36626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13113 states to 13113 states and 36626 transitions. [2021-08-21 19:04:54,035 INFO L78 Accepts]: Start accepts. Automaton has 13113 states and 36626 transitions. Word has length 35 [2021-08-21 19:04:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 13113 states and 36626 transitions. [2021-08-21 19:04:54,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 13113 states and 36626 transitions. [2021-08-21 19:04:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:54,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:54,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:54,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-08-21 19:04:54,060 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:04:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 430888225, now seen corresponding path program 2 times [2021-08-21 19:04:54,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:54,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857415900] [2021-08-21 19:04:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:54,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:54,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:54,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857415900] [2021-08-21 19:04:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857415900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:54,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900268030] [2021-08-21 19:04:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:54,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:54,159 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:54,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 19:04:59,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:04:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900268030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:59,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:59,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:04:59,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213805886] [2021-08-21 19:04:59,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:59,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:59,519 INFO L87 Difference]: Start difference. First operand 13113 states and 36626 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:59,667 INFO L93 Difference]: Finished difference Result 14867 states and 40121 transitions. [2021-08-21 19:04:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:59,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:04:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:59,700 INFO L225 Difference]: With dead ends: 14867 [2021-08-21 19:04:59,700 INFO L226 Difference]: Without dead ends: 14859 [2021-08-21 19:04:59,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14859 states. [2021-08-21 19:04:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14859 to 13109. [2021-08-21 19:04:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13109 states, 13108 states have (on average 2.789288983826671) internal successors, (36562), 13108 states have internal predecessors, (36562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13109 states to 13109 states and 36562 transitions. [2021-08-21 19:04:59,922 INFO L78 Accepts]: Start accepts. Automaton has 13109 states and 36562 transitions. Word has length 35 [2021-08-21 19:04:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:59,922 INFO L470 AbstractCegarLoop]: Abstraction has 13109 states and 36562 transitions. [2021-08-21 19:04:59,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13109 states and 36562 transitions. [2021-08-21 19:04:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:59,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:59,946 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:59,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:00,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:00,165 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:00,166 INFO L82 PathProgramCache]: Analyzing trace with hash 19349021, now seen corresponding path program 2 times [2021-08-21 19:05:00,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:00,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422096755] [2021-08-21 19:05:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:00,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:00,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:00,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422096755] [2021-08-21 19:05:00,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422096755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:00,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259844478] [2021-08-21 19:05:00,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:00,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:00,244 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:00,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 19:05:05,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:05,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:05,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259844478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:05,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:05,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:05,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595173888] [2021-08-21 19:05:05,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:05,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:05,783 INFO L87 Difference]: Start difference. First operand 13109 states and 36562 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:05,946 INFO L93 Difference]: Finished difference Result 14782 states and 39897 transitions. [2021-08-21 19:05:05,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:05,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:05,980 INFO L225 Difference]: With dead ends: 14782 [2021-08-21 19:05:05,980 INFO L226 Difference]: Without dead ends: 14774 [2021-08-21 19:05:05,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14774 states. [2021-08-21 19:05:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14774 to 13106. [2021-08-21 19:05:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13106 states, 13105 states have (on average 2.7864173979397178) internal successors, (36516), 13105 states have internal predecessors, (36516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13106 states to 13106 states and 36516 transitions. [2021-08-21 19:05:06,360 INFO L78 Accepts]: Start accepts. Automaton has 13106 states and 36516 transitions. Word has length 35 [2021-08-21 19:05:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:06,360 INFO L470 AbstractCegarLoop]: Abstraction has 13106 states and 36516 transitions. [2021-08-21 19:05:06,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13106 states and 36516 transitions. [2021-08-21 19:05:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:06,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:06,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:06,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 19:05:06,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 19:05:06,601 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1305901741, now seen corresponding path program 2 times [2021-08-21 19:05:06,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:06,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613291186] [2021-08-21 19:05:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:06,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:06,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613291186] [2021-08-21 19:05:06,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613291186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:06,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158727770] [2021-08-21 19:05:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:06,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:06,689 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 19:05:12,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:12,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158727770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:12,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:12,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:12,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9807917] [2021-08-21 19:05:12,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:12,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:12,680 INFO L87 Difference]: Start difference. First operand 13106 states and 36516 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:12,828 INFO L93 Difference]: Finished difference Result 14691 states and 39633 transitions. [2021-08-21 19:05:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:12,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:12,857 INFO L225 Difference]: With dead ends: 14691 [2021-08-21 19:05:12,857 INFO L226 Difference]: Without dead ends: 14683 [2021-08-21 19:05:12,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14683 states. [2021-08-21 19:05:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14683 to 13101. [2021-08-21 19:05:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13101 states, 13100 states have (on average 2.784503816793893) internal successors, (36477), 13100 states have internal predecessors, (36477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13101 states to 13101 states and 36477 transitions. [2021-08-21 19:05:13,077 INFO L78 Accepts]: Start accepts. Automaton has 13101 states and 36477 transitions. Word has length 35 [2021-08-21 19:05:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:13,078 INFO L470 AbstractCegarLoop]: Abstraction has 13101 states and 36477 transitions. [2021-08-21 19:05:13,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 13101 states and 36477 transitions. [2021-08-21 19:05:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:13,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:13,100 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:13,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:13,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 19:05:13,315 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1639506165, now seen corresponding path program 1 times [2021-08-21 19:05:13,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:13,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567001258] [2021-08-21 19:05:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:13,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:13,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:13,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567001258] [2021-08-21 19:05:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567001258] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:13,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:13,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:13,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962043181] [2021-08-21 19:05:13,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:13,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:13,404 INFO L87 Difference]: Start difference. First operand 13101 states and 36477 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:13,576 INFO L93 Difference]: Finished difference Result 15123 states and 40609 transitions. [2021-08-21 19:05:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:13,801 INFO L225 Difference]: With dead ends: 15123 [2021-08-21 19:05:13,801 INFO L226 Difference]: Without dead ends: 15111 [2021-08-21 19:05:13,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15111 states. [2021-08-21 19:05:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15111 to 13218. [2021-08-21 19:05:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13218 states, 13217 states have (on average 2.782552772943936) internal successors, (36777), 13217 states have internal predecessors, (36777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13218 states to 13218 states and 36777 transitions. [2021-08-21 19:05:13,999 INFO L78 Accepts]: Start accepts. Automaton has 13218 states and 36777 transitions. Word has length 35 [2021-08-21 19:05:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:13,999 INFO L470 AbstractCegarLoop]: Abstraction has 13218 states and 36777 transitions. [2021-08-21 19:05:13,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 13218 states and 36777 transitions. [2021-08-21 19:05:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:14,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:14,021 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:14,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-08-21 19:05:14,022 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2030228017, now seen corresponding path program 1 times [2021-08-21 19:05:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:14,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85474348] [2021-08-21 19:05:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:14,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:14,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:14,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85474348] [2021-08-21 19:05:14,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85474348] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:14,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:14,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:14,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861010143] [2021-08-21 19:05:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:14,296 INFO L87 Difference]: Start difference. First operand 13218 states and 36777 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:14,432 INFO L93 Difference]: Finished difference Result 15101 states and 40609 transitions. [2021-08-21 19:05:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:14,469 INFO L225 Difference]: With dead ends: 15101 [2021-08-21 19:05:14,470 INFO L226 Difference]: Without dead ends: 15089 [2021-08-21 19:05:14,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15089 states. [2021-08-21 19:05:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15089 to 13283. [2021-08-21 19:05:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13283 states, 13282 states have (on average 2.781584098780304) internal successors, (36945), 13282 states have internal predecessors, (36945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13283 states to 13283 states and 36945 transitions. [2021-08-21 19:05:14,922 INFO L78 Accepts]: Start accepts. Automaton has 13283 states and 36945 transitions. Word has length 35 [2021-08-21 19:05:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:14,922 INFO L470 AbstractCegarLoop]: Abstraction has 13283 states and 36945 transitions. [2021-08-21 19:05:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 13283 states and 36945 transitions. [2021-08-21 19:05:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:14,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:14,950 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-08-21 19:05:14,950 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1597683555, now seen corresponding path program 7 times [2021-08-21 19:05:14,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:14,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550373507] [2021-08-21 19:05:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:14,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:15,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:15,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550373507] [2021-08-21 19:05:15,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550373507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:15,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481540912] [2021-08-21 19:05:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:05:15,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:15,058 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:15,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 19:05:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:20,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481540912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:20,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:20,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:20,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398217147] [2021-08-21 19:05:20,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:20,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:20,548 INFO L87 Difference]: Start difference. First operand 13283 states and 36945 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:20,695 INFO L93 Difference]: Finished difference Result 15135 states and 40672 transitions. [2021-08-21 19:05:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:20,737 INFO L225 Difference]: With dead ends: 15135 [2021-08-21 19:05:20,737 INFO L226 Difference]: Without dead ends: 15127 [2021-08-21 19:05:20,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15127 states. [2021-08-21 19:05:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15127 to 13286. [2021-08-21 19:05:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13286 states, 13285 states have (on average 2.7793752352277004) internal successors, (36924), 13285 states have internal predecessors, (36924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13286 states to 13286 states and 36924 transitions. [2021-08-21 19:05:20,980 INFO L78 Accepts]: Start accepts. Automaton has 13286 states and 36924 transitions. Word has length 35 [2021-08-21 19:05:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:20,980 INFO L470 AbstractCegarLoop]: Abstraction has 13286 states and 36924 transitions. [2021-08-21 19:05:20,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 13286 states and 36924 transitions. [2021-08-21 19:05:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:21,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:21,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:21,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:21,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:21,233 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 368152473, now seen corresponding path program 2 times [2021-08-21 19:05:21,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:21,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932941006] [2021-08-21 19:05:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:21,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:21,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:21,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932941006] [2021-08-21 19:05:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932941006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:21,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370223334] [2021-08-21 19:05:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:21,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:21,338 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 19:05:26,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370223334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:27,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:27,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821353947] [2021-08-21 19:05:27,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:27,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:27,144 INFO L87 Difference]: Start difference. First operand 13286 states and 36924 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:27,289 INFO L93 Difference]: Finished difference Result 15027 states and 40410 transitions. [2021-08-21 19:05:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:27,328 INFO L225 Difference]: With dead ends: 15027 [2021-08-21 19:05:27,329 INFO L226 Difference]: Without dead ends: 15019 [2021-08-21 19:05:27,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15019 states. [2021-08-21 19:05:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15019 to 13284. [2021-08-21 19:05:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13284 states, 13283 states have (on average 2.778363321538809) internal successors, (36905), 13283 states have internal predecessors, (36905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13284 states to 13284 states and 36905 transitions. [2021-08-21 19:05:27,658 INFO L78 Accepts]: Start accepts. Automaton has 13284 states and 36905 transitions. Word has length 35 [2021-08-21 19:05:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:27,658 INFO L470 AbstractCegarLoop]: Abstraction has 13284 states and 36905 transitions. [2021-08-21 19:05:27,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:27,658 INFO L276 IsEmpty]: Start isEmpty. Operand 13284 states and 36905 transitions. [2021-08-21 19:05:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:27,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:27,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:27,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:27,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-08-21 19:05:27,901 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -589846691, now seen corresponding path program 1 times [2021-08-21 19:05:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:27,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810250350] [2021-08-21 19:05:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:27,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:27,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:27,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810250350] [2021-08-21 19:05:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810250350] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:27,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288482729] [2021-08-21 19:05:27,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:27,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:27,979 INFO L87 Difference]: Start difference. First operand 13284 states and 36905 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:28,121 INFO L93 Difference]: Finished difference Result 15244 states and 40863 transitions. [2021-08-21 19:05:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:28,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:28,157 INFO L225 Difference]: With dead ends: 15244 [2021-08-21 19:05:28,157 INFO L226 Difference]: Without dead ends: 15236 [2021-08-21 19:05:28,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2021-08-21 19:05:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 13293. [2021-08-21 19:05:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13292 states have (on average 2.7749021968101113) internal successors, (36884), 13292 states have internal predecessors, (36884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 36884 transitions. [2021-08-21 19:05:28,423 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 36884 transitions. Word has length 35 [2021-08-21 19:05:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 13293 states and 36884 transitions. [2021-08-21 19:05:28,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 36884 transitions. [2021-08-21 19:05:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:28,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:28,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:28,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-08-21 19:05:28,450 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 731447713, now seen corresponding path program 2 times [2021-08-21 19:05:28,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:28,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180463506] [2021-08-21 19:05:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:28,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:28,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:28,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180463506] [2021-08-21 19:05:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180463506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:28,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073426635] [2021-08-21 19:05:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:28,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:28,533 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:28,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 19:05:34,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:34,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073426635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:34,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:34,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:34,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138924147] [2021-08-21 19:05:34,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:34,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:34,321 INFO L87 Difference]: Start difference. First operand 13293 states and 36884 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:34,481 INFO L93 Difference]: Finished difference Result 15087 states and 40502 transitions. [2021-08-21 19:05:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:34,525 INFO L225 Difference]: With dead ends: 15087 [2021-08-21 19:05:34,525 INFO L226 Difference]: Without dead ends: 15079 [2021-08-21 19:05:34,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15079 states. [2021-08-21 19:05:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15079 to 13284. [2021-08-21 19:05:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13284 states, 13283 states have (on average 2.771738312128284) internal successors, (36817), 13283 states have internal predecessors, (36817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13284 states to 13284 states and 36817 transitions. [2021-08-21 19:05:34,761 INFO L78 Accepts]: Start accepts. Automaton has 13284 states and 36817 transitions. Word has length 35 [2021-08-21 19:05:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:34,761 INFO L470 AbstractCegarLoop]: Abstraction has 13284 states and 36817 transitions. [2021-08-21 19:05:34,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13284 states and 36817 transitions. [2021-08-21 19:05:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:34,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:34,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:34,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:35,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:35,001 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1345626401, now seen corresponding path program 7 times [2021-08-21 19:05:35,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:35,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028159675] [2021-08-21 19:05:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:35,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:35,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:35,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028159675] [2021-08-21 19:05:35,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028159675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:35,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732650813] [2021-08-21 19:05:35,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:05:35,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:35,088 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:35,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 19:05:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:40,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732650813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:40,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:40,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:40,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172970783] [2021-08-21 19:05:40,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:40,555 INFO L87 Difference]: Start difference. First operand 13284 states and 36817 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:40,678 INFO L93 Difference]: Finished difference Result 15006 states and 40236 transitions. [2021-08-21 19:05:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:40,704 INFO L225 Difference]: With dead ends: 15006 [2021-08-21 19:05:40,705 INFO L226 Difference]: Without dead ends: 14998 [2021-08-21 19:05:40,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14998 states. [2021-08-21 19:05:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14998 to 13288. [2021-08-21 19:05:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 2.7701512756829985) internal successors, (36807), 13287 states have internal predecessors, (36807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 36807 transitions. [2021-08-21 19:05:40,955 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 36807 transitions. Word has length 35 [2021-08-21 19:05:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:40,955 INFO L470 AbstractCegarLoop]: Abstraction has 13288 states and 36807 transitions. [2021-08-21 19:05:40,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 36807 transitions. [2021-08-21 19:05:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:40,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:40,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:41,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:41,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:41,197 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash -114980187, now seen corresponding path program 2 times [2021-08-21 19:05:41,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:41,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943203746] [2021-08-21 19:05:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:41,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:41,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:41,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943203746] [2021-08-21 19:05:41,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943203746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:41,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909631930] [2021-08-21 19:05:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:41,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:41,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:41,272 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:41,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 19:05:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:46,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909631930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:46,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:46,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:46,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246036394] [2021-08-21 19:05:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:46,701 INFO L87 Difference]: Start difference. First operand 13288 states and 36807 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:46,823 INFO L93 Difference]: Finished difference Result 14928 states and 40053 transitions. [2021-08-21 19:05:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:46,851 INFO L225 Difference]: With dead ends: 14928 [2021-08-21 19:05:46,852 INFO L226 Difference]: Without dead ends: 14920 [2021-08-21 19:05:46,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2021-08-21 19:05:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 13274. [2021-08-21 19:05:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13274 states, 13273 states have (on average 2.7683266782189406) internal successors, (36744), 13273 states have internal predecessors, (36744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13274 states to 13274 states and 36744 transitions. [2021-08-21 19:05:47,137 INFO L78 Accepts]: Start accepts. Automaton has 13274 states and 36744 transitions. Word has length 35 [2021-08-21 19:05:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:47,137 INFO L470 AbstractCegarLoop]: Abstraction has 13274 states and 36744 transitions. [2021-08-21 19:05:47,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13274 states and 36744 transitions. [2021-08-21 19:05:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:47,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:47,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:47,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:47,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:47,386 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1738408889, now seen corresponding path program 1 times [2021-08-21 19:05:47,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:47,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509371016] [2021-08-21 19:05:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:47,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:47,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:47,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509371016] [2021-08-21 19:05:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509371016] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:47,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:47,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:47,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340644585] [2021-08-21 19:05:47,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:47,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:47,460 INFO L87 Difference]: Start difference. First operand 13274 states and 36744 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:47,591 INFO L93 Difference]: Finished difference Result 15218 states and 40639 transitions. [2021-08-21 19:05:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:47,620 INFO L225 Difference]: With dead ends: 15218 [2021-08-21 19:05:47,620 INFO L226 Difference]: Without dead ends: 15206 [2021-08-21 19:05:47,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2021-08-21 19:05:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 13333. [2021-08-21 19:05:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13333 states, 13332 states have (on average 2.7694269426942695) internal successors, (36922), 13332 states have internal predecessors, (36922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13333 states to 13333 states and 36922 transitions. [2021-08-21 19:05:47,826 INFO L78 Accepts]: Start accepts. Automaton has 13333 states and 36922 transitions. Word has length 35 [2021-08-21 19:05:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:47,826 INFO L470 AbstractCegarLoop]: Abstraction has 13333 states and 36922 transitions. [2021-08-21 19:05:47,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 13333 states and 36922 transitions. [2021-08-21 19:05:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:47,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:47,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:47,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-08-21 19:05:47,851 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1356849197, now seen corresponding path program 1 times [2021-08-21 19:05:47,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:47,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306651950] [2021-08-21 19:05:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:47,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:47,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:47,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306651950] [2021-08-21 19:05:47,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306651950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:47,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:47,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:47,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610604853] [2021-08-21 19:05:47,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:47,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:47,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:47,935 INFO L87 Difference]: Start difference. First operand 13333 states and 36922 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:48,068 INFO L93 Difference]: Finished difference Result 15329 states and 40901 transitions. [2021-08-21 19:05:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:48,097 INFO L225 Difference]: With dead ends: 15329 [2021-08-21 19:05:48,097 INFO L226 Difference]: Without dead ends: 15321 [2021-08-21 19:05:48,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15321 states. [2021-08-21 19:05:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15321 to 13340. [2021-08-21 19:05:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13340 states, 13339 states have (on average 2.7635504910413076) internal successors, (36863), 13339 states have internal predecessors, (36863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13340 states to 13340 states and 36863 transitions. [2021-08-21 19:05:48,303 INFO L78 Accepts]: Start accepts. Automaton has 13340 states and 36863 transitions. Word has length 35 [2021-08-21 19:05:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 13340 states and 36863 transitions. [2021-08-21 19:05:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 13340 states and 36863 transitions. [2021-08-21 19:05:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:48,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:48,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-08-21 19:05:48,325 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1246614623, now seen corresponding path program 1 times [2021-08-21 19:05:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:48,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504568763] [2021-08-21 19:05:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:48,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:05:48,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:48,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504568763] [2021-08-21 19:05:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504568763] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:05:48,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:05:48,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:05:48,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895227056] [2021-08-21 19:05:48,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:48,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:48,532 INFO L87 Difference]: Start difference. First operand 13340 states and 36863 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:48,676 INFO L93 Difference]: Finished difference Result 15267 states and 40700 transitions. [2021-08-21 19:05:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:48,714 INFO L225 Difference]: With dead ends: 15267 [2021-08-21 19:05:48,714 INFO L226 Difference]: Without dead ends: 15259 [2021-08-21 19:05:48,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15259 states. [2021-08-21 19:05:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15259 to 13337. [2021-08-21 19:05:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13337 states, 13336 states have (on average 2.759223155368926) internal successors, (36797), 13336 states have internal predecessors, (36797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13337 states to 13337 states and 36797 transitions. [2021-08-21 19:05:48,945 INFO L78 Accepts]: Start accepts. Automaton has 13337 states and 36797 transitions. Word has length 35 [2021-08-21 19:05:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:48,945 INFO L470 AbstractCegarLoop]: Abstraction has 13337 states and 36797 transitions. [2021-08-21 19:05:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13337 states and 36797 transitions. [2021-08-21 19:05:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:48,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:48,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:48,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-08-21 19:05:48,968 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1693114161, now seen corresponding path program 7 times [2021-08-21 19:05:48,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:48,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413477611] [2021-08-21 19:05:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:48,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:49,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:49,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413477611] [2021-08-21 19:05:49,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413477611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:49,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218541785] [2021-08-21 19:05:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:05:49,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:49,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:49,049 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:49,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 19:05:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:05:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:54,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218541785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:54,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:54,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:05:54,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235874432] [2021-08-21 19:05:54,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:05:54,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:05:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:54,343 INFO L87 Difference]: Start difference. First operand 13337 states and 36797 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:54,472 INFO L93 Difference]: Finished difference Result 15115 states and 40365 transitions. [2021-08-21 19:05:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:05:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:05:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:54,499 INFO L225 Difference]: With dead ends: 15115 [2021-08-21 19:05:54,499 INFO L226 Difference]: Without dead ends: 15107 [2021-08-21 19:05:54,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:05:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-08-21 19:05:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 13342. [2021-08-21 19:05:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13342 states, 13341 states have (on average 2.757064687804512) internal successors, (36782), 13341 states have internal predecessors, (36782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13342 states to 13342 states and 36782 transitions. [2021-08-21 19:05:54,813 INFO L78 Accepts]: Start accepts. Automaton has 13342 states and 36782 transitions. Word has length 35 [2021-08-21 19:05:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:54,814 INFO L470 AbstractCegarLoop]: Abstraction has 13342 states and 36782 transitions. [2021-08-21 19:05:54,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13342 states and 36782 transitions. [2021-08-21 19:05:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:54,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:54,836 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:54,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:55,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-21 19:05:55,057 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:05:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 914932001, now seen corresponding path program 8 times [2021-08-21 19:05:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:55,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872062990] [2021-08-21 19:05:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:55,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:55,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:55,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872062990] [2021-08-21 19:05:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872062990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:55,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788688332] [2021-08-21 19:05:55,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:55,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:55,131 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:55,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 19:06:00,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:06:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:00,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788688332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:00,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:00,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:00,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743110538] [2021-08-21 19:06:00,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:00,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:00,247 INFO L87 Difference]: Start difference. First operand 13342 states and 36782 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:00,405 INFO L93 Difference]: Finished difference Result 15148 states and 40391 transitions. [2021-08-21 19:06:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:00,440 INFO L225 Difference]: With dead ends: 15148 [2021-08-21 19:06:00,440 INFO L226 Difference]: Without dead ends: 15140 [2021-08-21 19:06:00,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-08-21 19:06:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 13339. [2021-08-21 19:06:00,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13339 states, 13338 states have (on average 2.752361673414305) internal successors, (36711), 13338 states have internal predecessors, (36711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13339 states to 13339 states and 36711 transitions. [2021-08-21 19:06:00,647 INFO L78 Accepts]: Start accepts. Automaton has 13339 states and 36711 transitions. Word has length 35 [2021-08-21 19:06:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:00,648 INFO L470 AbstractCegarLoop]: Abstraction has 13339 states and 36711 transitions. [2021-08-21 19:06:00,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13339 states and 36711 transitions. [2021-08-21 19:06:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:00,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:00,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:00,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:00,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-08-21 19:06:00,897 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:00,897 INFO L82 PathProgramCache]: Analyzing trace with hash -259823947, now seen corresponding path program 2 times [2021-08-21 19:06:00,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:00,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108429130] [2021-08-21 19:06:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:00,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:00,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:00,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108429130] [2021-08-21 19:06:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108429130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:00,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492620907] [2021-08-21 19:06:00,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:06:00,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:00,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:00,971 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:00,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 19:06:06,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:06:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:06,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:06,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492620907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:06,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:06,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883972526] [2021-08-21 19:06:06,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:06,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:06,291 INFO L87 Difference]: Start difference. First operand 13339 states and 36711 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:06,416 INFO L93 Difference]: Finished difference Result 14975 states and 39974 transitions. [2021-08-21 19:06:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:06,444 INFO L225 Difference]: With dead ends: 14975 [2021-08-21 19:06:06,444 INFO L226 Difference]: Without dead ends: 14967 [2021-08-21 19:06:06,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2021-08-21 19:06:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 13338. [2021-08-21 19:06:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 2.7513683736972334) internal successors, (36695), 13337 states have internal predecessors, (36695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 36695 transitions. [2021-08-21 19:06:06,642 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 36695 transitions. Word has length 35 [2021-08-21 19:06:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:06,642 INFO L470 AbstractCegarLoop]: Abstraction has 13338 states and 36695 transitions. [2021-08-21 19:06:06,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 36695 transitions. [2021-08-21 19:06:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:06,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:06,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:06,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:06,889 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1038006107, now seen corresponding path program 2 times [2021-08-21 19:06:06,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:06,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605596279] [2021-08-21 19:06:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:06,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:07,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:07,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605596279] [2021-08-21 19:06:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605596279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:07,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974267360] [2021-08-21 19:06:07,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:06:07,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:07,074 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 19:06:11,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:06:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:12,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974267360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:12,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:12,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:12,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665164727] [2021-08-21 19:06:12,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:12,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:12,057 INFO L87 Difference]: Start difference. First operand 13338 states and 36695 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:12,233 INFO L93 Difference]: Finished difference Result 15132 states and 40295 transitions. [2021-08-21 19:06:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:12,258 INFO L225 Difference]: With dead ends: 15132 [2021-08-21 19:06:12,258 INFO L226 Difference]: Without dead ends: 15124 [2021-08-21 19:06:12,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15124 states. [2021-08-21 19:06:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15124 to 13335. [2021-08-21 19:06:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13335 states, 13334 states have (on average 2.747112644367782) internal successors, (36630), 13334 states have internal predecessors, (36630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13335 states to 13335 states and 36630 transitions. [2021-08-21 19:06:12,449 INFO L78 Accepts]: Start accepts. Automaton has 13335 states and 36630 transitions. Word has length 35 [2021-08-21 19:06:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:12,450 INFO L470 AbstractCegarLoop]: Abstraction has 13335 states and 36630 transitions. [2021-08-21 19:06:12,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13335 states and 36630 transitions. [2021-08-21 19:06:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:12,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:12,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:12,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:12,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-08-21 19:06:12,685 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1304023081, now seen corresponding path program 2 times [2021-08-21 19:06:12,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:12,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756581038] [2021-08-21 19:06:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:12,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:12,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:12,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756581038] [2021-08-21 19:06:12,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756581038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:12,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779039338] [2021-08-21 19:06:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:06:12,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:12,755 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:12,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 19:06:17,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:06:17,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779039338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:17,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:17,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280805498] [2021-08-21 19:06:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:17,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:17,891 INFO L87 Difference]: Start difference. First operand 13335 states and 36630 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:18,029 INFO L93 Difference]: Finished difference Result 15136 states and 40235 transitions. [2021-08-21 19:06:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:18,056 INFO L225 Difference]: With dead ends: 15136 [2021-08-21 19:06:18,056 INFO L226 Difference]: Without dead ends: 15128 [2021-08-21 19:06:18,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15128 states. [2021-08-21 19:06:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15128 to 13332. [2021-08-21 19:06:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13332 states, 13331 states have (on average 2.743305078388718) internal successors, (36571), 13331 states have internal predecessors, (36571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13332 states to 13332 states and 36571 transitions. [2021-08-21 19:06:18,248 INFO L78 Accepts]: Start accepts. Automaton has 13332 states and 36571 transitions. Word has length 35 [2021-08-21 19:06:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:18,248 INFO L470 AbstractCegarLoop]: Abstraction has 13332 states and 36571 transitions. [2021-08-21 19:06:18,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13332 states and 36571 transitions. [2021-08-21 19:06:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:18,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:18,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:18,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-08-21 19:06:18,493 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash -648915027, now seen corresponding path program 2 times [2021-08-21 19:06:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:18,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569752555] [2021-08-21 19:06:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:18,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:18,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:18,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569752555] [2021-08-21 19:06:18,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569752555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:18,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301443203] [2021-08-21 19:06:18,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:06:18,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:18,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:18,678 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:18,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 19:06:23,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:06:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:23,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301443203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:23,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:23,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:23,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79851517] [2021-08-21 19:06:23,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:23,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:23,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:23,803 INFO L87 Difference]: Start difference. First operand 13332 states and 36571 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:23,937 INFO L93 Difference]: Finished difference Result 15032 states and 39962 transitions. [2021-08-21 19:06:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:23,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:23,968 INFO L225 Difference]: With dead ends: 15032 [2021-08-21 19:06:23,968 INFO L226 Difference]: Without dead ends: 15024 [2021-08-21 19:06:23,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15024 states. [2021-08-21 19:06:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15024 to 13323. [2021-08-21 19:06:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13323 states, 13322 states have (on average 2.7394535355051794) internal successors, (36495), 13322 states have internal predecessors, (36495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13323 states to 13323 states and 36495 transitions. [2021-08-21 19:06:24,173 INFO L78 Accepts]: Start accepts. Automaton has 13323 states and 36495 transitions. Word has length 35 [2021-08-21 19:06:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:24,173 INFO L470 AbstractCegarLoop]: Abstraction has 13323 states and 36495 transitions. [2021-08-21 19:06:24,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13323 states and 36495 transitions. [2021-08-21 19:06:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:24,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:24,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:24,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:24,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-08-21 19:06:24,409 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 229356785, now seen corresponding path program 3 times [2021-08-21 19:06:24,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:24,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108792885] [2021-08-21 19:06:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:24,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:24,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:24,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108792885] [2021-08-21 19:06:24,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108792885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:24,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012673710] [2021-08-21 19:06:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:06:24,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:24,485 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:24,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 19:06:29,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:06:29,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:29,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012673710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:29,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653610176] [2021-08-21 19:06:29,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:29,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:29,667 INFO L87 Difference]: Start difference. First operand 13323 states and 36495 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:29,793 INFO L93 Difference]: Finished difference Result 15200 states and 40355 transitions. [2021-08-21 19:06:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:29,823 INFO L225 Difference]: With dead ends: 15200 [2021-08-21 19:06:29,823 INFO L226 Difference]: Without dead ends: 15188 [2021-08-21 19:06:29,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2021-08-21 19:06:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 13438. [2021-08-21 19:06:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13438 states, 13437 states have (on average 2.7454789015405225) internal successors, (36891), 13437 states have internal predecessors, (36891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13438 states to 13438 states and 36891 transitions. [2021-08-21 19:06:30,023 INFO L78 Accepts]: Start accepts. Automaton has 13438 states and 36891 transitions. Word has length 35 [2021-08-21 19:06:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:30,023 INFO L470 AbstractCegarLoop]: Abstraction has 13438 states and 36891 transitions. [2021-08-21 19:06:30,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13438 states and 36891 transitions. [2021-08-21 19:06:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:30,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:30,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:30,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-21 19:06:30,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:30,269 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash 183422789, now seen corresponding path program 3 times [2021-08-21 19:06:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:30,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445690986] [2021-08-21 19:06:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:30,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:30,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:30,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445690986] [2021-08-21 19:06:30,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445690986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:30,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909366479] [2021-08-21 19:06:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:06:30,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:30,344 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:30,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 19:06:35,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:06:35,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:35,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:35,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909366479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:35,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:35,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:35,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31851640] [2021-08-21 19:06:35,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:35,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:35,623 INFO L87 Difference]: Start difference. First operand 13438 states and 36891 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:35,761 INFO L93 Difference]: Finished difference Result 15418 states and 41014 transitions. [2021-08-21 19:06:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:35,791 INFO L225 Difference]: With dead ends: 15418 [2021-08-21 19:06:35,791 INFO L226 Difference]: Without dead ends: 15410 [2021-08-21 19:06:35,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15410 states. [2021-08-21 19:06:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15410 to 13548. [2021-08-21 19:06:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13548 states, 13547 states have (on average 2.7547796560124014) internal successors, (37319), 13547 states have internal predecessors, (37319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13548 states to 13548 states and 37319 transitions. [2021-08-21 19:06:36,048 INFO L78 Accepts]: Start accepts. Automaton has 13548 states and 37319 transitions. Word has length 35 [2021-08-21 19:06:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:36,048 INFO L470 AbstractCegarLoop]: Abstraction has 13548 states and 37319 transitions. [2021-08-21 19:06:36,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 13548 states and 37319 transitions. [2021-08-21 19:06:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:36,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:36,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:36,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:36,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:36,272 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash 574144641, now seen corresponding path program 3 times [2021-08-21 19:06:36,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:36,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816012568] [2021-08-21 19:06:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:36,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:36,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:36,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816012568] [2021-08-21 19:06:36,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816012568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:36,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048534981] [2021-08-21 19:06:36,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:06:36,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:36,463 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:36,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 19:06:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:06:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:41,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048534981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:41,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:41,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:41,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020844040] [2021-08-21 19:06:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:41,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:41,725 INFO L87 Difference]: Start difference. First operand 13548 states and 37319 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:41,844 INFO L93 Difference]: Finished difference Result 15460 states and 41300 transitions. [2021-08-21 19:06:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:41,869 INFO L225 Difference]: With dead ends: 15460 [2021-08-21 19:06:41,869 INFO L226 Difference]: Without dead ends: 15452 [2021-08-21 19:06:41,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15452 states. [2021-08-21 19:06:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15452 to 13631. [2021-08-21 19:06:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13631 states, 13630 states have (on average 2.760821716801174) internal successors, (37630), 13630 states have internal predecessors, (37630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13631 states to 13631 states and 37630 transitions. [2021-08-21 19:06:42,052 INFO L78 Accepts]: Start accepts. Automaton has 13631 states and 37630 transitions. Word has length 35 [2021-08-21 19:06:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:42,052 INFO L470 AbstractCegarLoop]: Abstraction has 13631 states and 37630 transitions. [2021-08-21 19:06:42,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 13631 states and 37630 transitions. [2021-08-21 19:06:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:42,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:42,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:42,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:42,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-08-21 19:06:42,296 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1498918527, now seen corresponding path program 3 times [2021-08-21 19:06:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:42,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574815282] [2021-08-21 19:06:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:42,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:42,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:42,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574815282] [2021-08-21 19:06:42,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574815282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:42,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479763356] [2021-08-21 19:06:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:06:42,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:42,368 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:42,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 19:06:47,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:06:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:47,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479763356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:47,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:47,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:47,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014899337] [2021-08-21 19:06:47,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:47,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:47,424 INFO L87 Difference]: Start difference. First operand 13631 states and 37630 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:47,553 INFO L93 Difference]: Finished difference Result 15516 states and 41513 transitions. [2021-08-21 19:06:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:47,578 INFO L225 Difference]: With dead ends: 15516 [2021-08-21 19:06:47,578 INFO L226 Difference]: Without dead ends: 15508 [2021-08-21 19:06:47,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15508 states. [2021-08-21 19:06:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15508 to 13729. [2021-08-21 19:06:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13729 states, 13728 states have (on average 2.7719988344988344) internal successors, (38054), 13728 states have internal predecessors, (38054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 38054 transitions. [2021-08-21 19:06:47,766 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 38054 transitions. Word has length 35 [2021-08-21 19:06:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:47,766 INFO L470 AbstractCegarLoop]: Abstraction has 13729 states and 38054 transitions. [2021-08-21 19:06:47,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 38054 transitions. [2021-08-21 19:06:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:47,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:47,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:47,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:48,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-08-21 19:06:48,009 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1283598983, now seen corresponding path program 4 times [2021-08-21 19:06:48,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:48,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278917187] [2021-08-21 19:06:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:48,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:06:48,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:48,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278917187] [2021-08-21 19:06:48,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278917187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:48,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895750159] [2021-08-21 19:06:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:06:48,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:48,087 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 19:06:53,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:06:53,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:53,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:06:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895750159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:53,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:53,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:53,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703566723] [2021-08-21 19:06:53,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:53,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:53,189 INFO L87 Difference]: Start difference. First operand 13729 states and 38054 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:53,316 INFO L93 Difference]: Finished difference Result 15463 states and 41720 transitions. [2021-08-21 19:06:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:53,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:53,342 INFO L225 Difference]: With dead ends: 15463 [2021-08-21 19:06:53,342 INFO L226 Difference]: Without dead ends: 15455 [2021-08-21 19:06:53,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15455 states. [2021-08-21 19:06:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15455 to 13818. [2021-08-21 19:06:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13818 states, 13817 states have (on average 2.7787508142143738) internal successors, (38394), 13817 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13818 states to 13818 states and 38394 transitions. [2021-08-21 19:06:53,529 INFO L78 Accepts]: Start accepts. Automaton has 13818 states and 38394 transitions. Word has length 35 [2021-08-21 19:06:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:53,529 INFO L470 AbstractCegarLoop]: Abstraction has 13818 states and 38394 transitions. [2021-08-21 19:06:53,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 13818 states and 38394 transitions. [2021-08-21 19:06:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:53,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:53,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:53,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-08-21 19:06:53,765 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1695138187, now seen corresponding path program 4 times [2021-08-21 19:06:53,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:53,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608367383] [2021-08-21 19:06:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:53,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:06:53,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:53,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608367383] [2021-08-21 19:06:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608367383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:53,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535804045] [2021-08-21 19:06:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:06:53,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:53,836 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:53,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 19:06:58,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:06:58,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:06:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:06:58,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:06:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:06:59,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535804045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:59,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:06:59,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:06:59,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126545465] [2021-08-21 19:06:59,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:06:59,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:06:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:06:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:59,145 INFO L87 Difference]: Start difference. First operand 13818 states and 38394 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:06:59,269 INFO L93 Difference]: Finished difference Result 15486 states and 41905 transitions. [2021-08-21 19:06:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:06:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:06:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:06:59,296 INFO L225 Difference]: With dead ends: 15486 [2021-08-21 19:06:59,296 INFO L226 Difference]: Without dead ends: 15478 [2021-08-21 19:06:59,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:06:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15478 states. [2021-08-21 19:06:59,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15478 to 13886. [2021-08-21 19:06:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13886 states, 13885 states have (on average 2.784155563557796) internal successors, (38658), 13885 states have internal predecessors, (38658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13886 states to 13886 states and 38658 transitions. [2021-08-21 19:06:59,477 INFO L78 Accepts]: Start accepts. Automaton has 13886 states and 38658 transitions. Word has length 35 [2021-08-21 19:06:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:06:59,477 INFO L470 AbstractCegarLoop]: Abstraction has 13886 states and 38658 transitions. [2021-08-21 19:06:59,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:06:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13886 states and 38658 transitions. [2021-08-21 19:06:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:06:59,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:06:59,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:06:59,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 19:06:59,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:59,713 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:06:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:06:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1361123215, now seen corresponding path program 4 times [2021-08-21 19:06:59,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:06:59,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863656153] [2021-08-21 19:06:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:06:59,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:06:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:06:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:06:59,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:06:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863656153] [2021-08-21 19:06:59,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863656153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:06:59,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712497321] [2021-08-21 19:06:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:06:59,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:06:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:06:59,842 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:06:59,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 19:07:04,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:07:04,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:05,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712497321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:05,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264582295] [2021-08-21 19:07:05,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:05,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:05,028 INFO L87 Difference]: Start difference. First operand 13886 states and 38658 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:05,141 INFO L93 Difference]: Finished difference Result 15672 states and 42228 transitions. [2021-08-21 19:07:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:05,166 INFO L225 Difference]: With dead ends: 15672 [2021-08-21 19:07:05,166 INFO L226 Difference]: Without dead ends: 15664 [2021-08-21 19:07:05,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15664 states. [2021-08-21 19:07:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15664 to 13853. [2021-08-21 19:07:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13853 states, 13852 states have (on average 2.7832082009818078) internal successors, (38553), 13852 states have internal predecessors, (38553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13853 states to 13853 states and 38553 transitions. [2021-08-21 19:07:05,346 INFO L78 Accepts]: Start accepts. Automaton has 13853 states and 38553 transitions. Word has length 35 [2021-08-21 19:07:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:05,346 INFO L470 AbstractCegarLoop]: Abstraction has 13853 states and 38553 transitions. [2021-08-21 19:07:05,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13853 states and 38553 transitions. [2021-08-21 19:07:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:05,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:05,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:05,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:05,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-08-21 19:07:05,582 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1622462917, now seen corresponding path program 1 times [2021-08-21 19:07:05,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:05,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034133988] [2021-08-21 19:07:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:05,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:05,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:05,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034133988] [2021-08-21 19:07:05,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034133988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:05,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481446654] [2021-08-21 19:07:05,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:05,653 INFO L87 Difference]: Start difference. First operand 13853 states and 38553 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:05,775 INFO L93 Difference]: Finished difference Result 15912 states and 42665 transitions. [2021-08-21 19:07:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:05,801 INFO L225 Difference]: With dead ends: 15912 [2021-08-21 19:07:05,801 INFO L226 Difference]: Without dead ends: 15900 [2021-08-21 19:07:05,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2021-08-21 19:07:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 13930. [2021-08-21 19:07:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13930 states, 13929 states have (on average 2.7840476703280923) internal successors, (38779), 13929 states have internal predecessors, (38779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13930 states to 13930 states and 38779 transitions. [2021-08-21 19:07:06,099 INFO L78 Accepts]: Start accepts. Automaton has 13930 states and 38779 transitions. Word has length 35 [2021-08-21 19:07:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:06,099 INFO L470 AbstractCegarLoop]: Abstraction has 13930 states and 38779 transitions. [2021-08-21 19:07:06,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13930 states and 38779 transitions. [2021-08-21 19:07:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:06,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:06,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:06,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-08-21 19:07:06,119 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2013184769, now seen corresponding path program 1 times [2021-08-21 19:07:06,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:06,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344011292] [2021-08-21 19:07:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:06,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:06,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:06,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344011292] [2021-08-21 19:07:06,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344011292] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:06,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:06,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:06,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821523179] [2021-08-21 19:07:06,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:06,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:06,191 INFO L87 Difference]: Start difference. First operand 13930 states and 38779 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:06,452 INFO L93 Difference]: Finished difference Result 15928 states and 42799 transitions. [2021-08-21 19:07:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:06,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:06,479 INFO L225 Difference]: With dead ends: 15928 [2021-08-21 19:07:06,479 INFO L226 Difference]: Without dead ends: 15916 [2021-08-21 19:07:06,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15916 states. [2021-08-21 19:07:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15916 to 14003. [2021-08-21 19:07:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14003 states, 14002 states have (on average 2.7836023425224967) internal successors, (38976), 14002 states have internal predecessors, (38976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14003 states to 14003 states and 38976 transitions. [2021-08-21 19:07:06,660 INFO L78 Accepts]: Start accepts. Automaton has 14003 states and 38976 transitions. Word has length 35 [2021-08-21 19:07:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:06,660 INFO L470 AbstractCegarLoop]: Abstraction has 14003 states and 38976 transitions. [2021-08-21 19:07:06,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14003 states and 38976 transitions. [2021-08-21 19:07:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:06,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:06,680 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:06,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-08-21 19:07:06,680 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1614726803, now seen corresponding path program 5 times [2021-08-21 19:07:06,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:06,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120481714] [2021-08-21 19:07:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:06,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:06,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:06,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120481714] [2021-08-21 19:07:06,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120481714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:06,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148670905] [2021-08-21 19:07:06,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:07:06,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:06,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:06,756 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:06,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 19:07:11,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:07:11,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:11,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148670905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:11,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:11,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:11,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308961572] [2021-08-21 19:07:11,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:11,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:11,806 INFO L87 Difference]: Start difference. First operand 14003 states and 38976 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:11,929 INFO L93 Difference]: Finished difference Result 15968 states and 42960 transitions. [2021-08-21 19:07:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:11,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:11,955 INFO L225 Difference]: With dead ends: 15968 [2021-08-21 19:07:11,955 INFO L226 Difference]: Without dead ends: 15960 [2021-08-21 19:07:11,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15960 states. [2021-08-21 19:07:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15960 to 14100. [2021-08-21 19:07:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14100 states, 14099 states have (on average 2.7868643166181997) internal successors, (39292), 14099 states have internal predecessors, (39292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14100 states to 14100 states and 39292 transitions. [2021-08-21 19:07:12,179 INFO L78 Accepts]: Start accepts. Automaton has 14100 states and 39292 transitions. Word has length 35 [2021-08-21 19:07:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:12,179 INFO L470 AbstractCegarLoop]: Abstraction has 14100 states and 39292 transitions. [2021-08-21 19:07:12,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 14100 states and 39292 transitions. [2021-08-21 19:07:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:12,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:12,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:12,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:12,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-08-21 19:07:12,401 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash 351109225, now seen corresponding path program 2 times [2021-08-21 19:07:12,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:12,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758247269] [2021-08-21 19:07:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:12,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:12,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:12,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758247269] [2021-08-21 19:07:12,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758247269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:12,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548844275] [2021-08-21 19:07:12,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:07:12,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:12,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:12,472 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:12,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 19:07:17,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:07:17,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548844275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:17,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:17,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:17,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133559045] [2021-08-21 19:07:17,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:17,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:17,674 INFO L87 Difference]: Start difference. First operand 14100 states and 39292 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:17,818 INFO L93 Difference]: Finished difference Result 15959 states and 43022 transitions. [2021-08-21 19:07:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:17,842 INFO L225 Difference]: With dead ends: 15959 [2021-08-21 19:07:17,842 INFO L226 Difference]: Without dead ends: 15951 [2021-08-21 19:07:17,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15951 states. [2021-08-21 19:07:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15951 to 14151. [2021-08-21 19:07:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 2.789469964664311) internal successors, (39471), 14150 states have internal predecessors, (39471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 39471 transitions. [2021-08-21 19:07:18,018 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 39471 transitions. Word has length 35 [2021-08-21 19:07:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:18,019 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 39471 transitions. [2021-08-21 19:07:18,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 39471 transitions. [2021-08-21 19:07:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:18,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:18,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:18,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:18,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-08-21 19:07:18,241 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash -606889939, now seen corresponding path program 1 times [2021-08-21 19:07:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:18,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454975284] [2021-08-21 19:07:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:18,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:18,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:18,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454975284] [2021-08-21 19:07:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454975284] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:18,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:18,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:18,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560897899] [2021-08-21 19:07:18,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:18,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:18,370 INFO L87 Difference]: Start difference. First operand 14151 states and 39471 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:18,495 INFO L93 Difference]: Finished difference Result 16306 states and 43801 transitions. [2021-08-21 19:07:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:18,521 INFO L225 Difference]: With dead ends: 16306 [2021-08-21 19:07:18,521 INFO L226 Difference]: Without dead ends: 16298 [2021-08-21 19:07:18,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16298 states. [2021-08-21 19:07:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16298 to 14250. [2021-08-21 19:07:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14250 states, 14249 states have (on average 2.7950733384798934) internal successors, (39827), 14249 states have internal predecessors, (39827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14250 states to 14250 states and 39827 transitions. [2021-08-21 19:07:18,794 INFO L78 Accepts]: Start accepts. Automaton has 14250 states and 39827 transitions. Word has length 35 [2021-08-21 19:07:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:18,794 INFO L470 AbstractCegarLoop]: Abstraction has 14250 states and 39827 transitions. [2021-08-21 19:07:18,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 14250 states and 39827 transitions. [2021-08-21 19:07:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:18,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:18,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:18,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-08-21 19:07:18,813 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 714404465, now seen corresponding path program 2 times [2021-08-21 19:07:18,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330994645] [2021-08-21 19:07:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:18,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:18,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:18,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330994645] [2021-08-21 19:07:18,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330994645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:18,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168393370] [2021-08-21 19:07:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:07:18,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:18,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:18,884 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:18,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 19:07:23,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:07:23,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:24,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168393370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:24,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:24,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84742415] [2021-08-21 19:07:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:24,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:24,079 INFO L87 Difference]: Start difference. First operand 14250 states and 39827 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:24,203 INFO L93 Difference]: Finished difference Result 16188 states and 43776 transitions. [2021-08-21 19:07:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:24,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:24,230 INFO L225 Difference]: With dead ends: 16188 [2021-08-21 19:07:24,230 INFO L226 Difference]: Without dead ends: 16180 [2021-08-21 19:07:24,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16180 states. [2021-08-21 19:07:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16180 to 14321. [2021-08-21 19:07:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 14320 states have (on average 2.8005586592178773) internal successors, (40104), 14320 states have internal predecessors, (40104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 40104 transitions. [2021-08-21 19:07:24,420 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 40104 transitions. Word has length 35 [2021-08-21 19:07:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 40104 transitions. [2021-08-21 19:07:24,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 40104 transitions. [2021-08-21 19:07:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:24,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:24,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:24,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:24,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:24,653 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1328583153, now seen corresponding path program 5 times [2021-08-21 19:07:24,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:24,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680412759] [2021-08-21 19:07:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:24,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:24,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:24,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680412759] [2021-08-21 19:07:24,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680412759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:24,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537979590] [2021-08-21 19:07:24,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:07:24,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:24,727 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:24,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 19:07:29,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:07:29,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537979590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:30,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:30,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:30,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436793581] [2021-08-21 19:07:30,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:30,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:30,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:30,045 INFO L87 Difference]: Start difference. First operand 14321 states and 40104 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:30,168 INFO L93 Difference]: Finished difference Result 16196 states and 43922 transitions. [2021-08-21 19:07:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:30,194 INFO L225 Difference]: With dead ends: 16196 [2021-08-21 19:07:30,194 INFO L226 Difference]: Without dead ends: 16188 [2021-08-21 19:07:30,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2021-08-21 19:07:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 14395. [2021-08-21 19:07:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14395 states, 14394 states have (on average 2.80269556759761) internal successors, (40342), 14394 states have internal predecessors, (40342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14395 states to 14395 states and 40342 transitions. [2021-08-21 19:07:30,456 INFO L78 Accepts]: Start accepts. Automaton has 14395 states and 40342 transitions. Word has length 35 [2021-08-21 19:07:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:30,456 INFO L470 AbstractCegarLoop]: Abstraction has 14395 states and 40342 transitions. [2021-08-21 19:07:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14395 states and 40342 transitions. [2021-08-21 19:07:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:30,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:30,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:30,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:30,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:30,693 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -132023435, now seen corresponding path program 2 times [2021-08-21 19:07:30,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:30,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911067075] [2021-08-21 19:07:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:30,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:30,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:30,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911067075] [2021-08-21 19:07:30,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911067075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:30,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999132174] [2021-08-21 19:07:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:07:30,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:30,762 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:30,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 19:07:35,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:07:35,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:07:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:07:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:07:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:36,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999132174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:36,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:07:36,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:07:36,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331329148] [2021-08-21 19:07:36,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:36,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:36,135 INFO L87 Difference]: Start difference. First operand 14395 states and 40342 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:36,254 INFO L93 Difference]: Finished difference Result 16201 states and 43987 transitions. [2021-08-21 19:07:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:36,284 INFO L225 Difference]: With dead ends: 16201 [2021-08-21 19:07:36,284 INFO L226 Difference]: Without dead ends: 16193 [2021-08-21 19:07:36,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16193 states. [2021-08-21 19:07:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16193 to 14438. [2021-08-21 19:07:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14438 states, 14437 states have (on average 2.8034217635242777) internal successors, (40473), 14437 states have internal predecessors, (40473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14438 states to 14438 states and 40473 transitions. [2021-08-21 19:07:36,501 INFO L78 Accepts]: Start accepts. Automaton has 14438 states and 40473 transitions. Word has length 35 [2021-08-21 19:07:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:36,501 INFO L470 AbstractCegarLoop]: Abstraction has 14438 states and 40473 transitions. [2021-08-21 19:07:36,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14438 states and 40473 transitions. [2021-08-21 19:07:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:36,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:36,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:36,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:36,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-08-21 19:07:36,749 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1721365641, now seen corresponding path program 1 times [2021-08-21 19:07:36,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:36,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974633118] [2021-08-21 19:07:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:36,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:36,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:36,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974633118] [2021-08-21 19:07:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974633118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:36,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:36,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:36,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439754618] [2021-08-21 19:07:36,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:36,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:36,818 INFO L87 Difference]: Start difference. First operand 14438 states and 40473 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:36,956 INFO L93 Difference]: Finished difference Result 16442 states and 44368 transitions. [2021-08-21 19:07:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:36,983 INFO L225 Difference]: With dead ends: 16442 [2021-08-21 19:07:36,983 INFO L226 Difference]: Without dead ends: 16430 [2021-08-21 19:07:36,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16430 states. [2021-08-21 19:07:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16430 to 14489. [2021-08-21 19:07:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14489 states, 14488 states have (on average 2.8054251794588625) internal successors, (40645), 14488 states have internal predecessors, (40645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14489 states to 14489 states and 40645 transitions. [2021-08-21 19:07:37,176 INFO L78 Accepts]: Start accepts. Automaton has 14489 states and 40645 transitions. Word has length 35 [2021-08-21 19:07:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:37,176 INFO L470 AbstractCegarLoop]: Abstraction has 14489 states and 40645 transitions. [2021-08-21 19:07:37,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14489 states and 40645 transitions. [2021-08-21 19:07:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:37,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:37,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-08-21 19:07:37,197 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1339805949, now seen corresponding path program 1 times [2021-08-21 19:07:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214761180] [2021-08-21 19:07:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:37,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:37,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:37,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214761180] [2021-08-21 19:07:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214761180] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:37,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:37,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:37,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235856092] [2021-08-21 19:07:37,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:37,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:37,266 INFO L87 Difference]: Start difference. First operand 14489 states and 40645 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:37,401 INFO L93 Difference]: Finished difference Result 16646 states and 44911 transitions. [2021-08-21 19:07:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:37,430 INFO L225 Difference]: With dead ends: 16646 [2021-08-21 19:07:37,430 INFO L226 Difference]: Without dead ends: 16638 [2021-08-21 19:07:37,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-08-21 19:07:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14616. [2021-08-21 19:07:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14616 states, 14615 states have (on average 2.814163530619227) internal successors, (41129), 14615 states have internal predecessors, (41129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14616 states to 14616 states and 41129 transitions. [2021-08-21 19:07:37,622 INFO L78 Accepts]: Start accepts. Automaton has 14616 states and 41129 transitions. Word has length 35 [2021-08-21 19:07:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:37,623 INFO L470 AbstractCegarLoop]: Abstraction has 14616 states and 41129 transitions. [2021-08-21 19:07:37,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 14616 states and 41129 transitions. [2021-08-21 19:07:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:37,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:37,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-08-21 19:07:37,643 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1263657871, now seen corresponding path program 1 times [2021-08-21 19:07:37,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:37,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009217645] [2021-08-21 19:07:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:37,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:07:37,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:37,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009217645] [2021-08-21 19:07:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009217645] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:07:37,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:07:37,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:07:37,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468065064] [2021-08-21 19:07:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:07:37,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:07:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:07:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:37,886 INFO L87 Difference]: Start difference. First operand 14616 states and 41129 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:07:38,013 INFO L93 Difference]: Finished difference Result 16720 states and 45333 transitions. [2021-08-21 19:07:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:07:38,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 19:07:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:07:38,040 INFO L225 Difference]: With dead ends: 16720 [2021-08-21 19:07:38,040 INFO L226 Difference]: Without dead ends: 16712 [2021-08-21 19:07:38,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:07:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16712 states. [2021-08-21 19:07:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16712 to 14694. [2021-08-21 19:07:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14694 states, 14693 states have (on average 2.8205267814605595) internal successors, (41442), 14693 states have internal predecessors, (41442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14694 states to 14694 states and 41442 transitions. [2021-08-21 19:07:38,234 INFO L78 Accepts]: Start accepts. Automaton has 14694 states and 41442 transitions. Word has length 35 [2021-08-21 19:07:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:07:38,235 INFO L470 AbstractCegarLoop]: Abstraction has 14694 states and 41442 transitions. [2021-08-21 19:07:38,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:07:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 14694 states and 41442 transitions. [2021-08-21 19:07:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:07:38,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:07:38,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:07:38,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-08-21 19:07:38,256 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 4 more)] === [2021-08-21 19:07:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:07:38,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1676070913, now seen corresponding path program 4 times [2021-08-21 19:07:38,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:07:38,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297179179] [2021-08-21 19:07:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:07:38,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:07:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:07:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:07:38,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:07:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297179179] [2021-08-21 19:07:38,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297179179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:07:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232541244] [2021-08-21 19:07:38,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:07:38,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:07:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:07:38,324 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:07:38,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 19:07:41,844 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:07:41,845 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:07:42,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:42,880 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:07:42,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 19:07:43,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-08-21 19:07:43,081 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:07:43,082 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 19:07:43,085 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:07:43,085 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:07:43,086 INFO L202 PluginConnector]: Adding new model add-sub07.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:07:43 BasicIcfg [2021-08-21 19:07:43,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:07:43,087 INFO L168 Benchmark]: Toolchain (without parser) took 902587.43 ms. Allocated memory was 174.1 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 154.5 MB in the beginning and 4.1 GB in the end (delta: -3.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 19:07:43,087 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.39 ms. Allocated memory is still 174.1 MB. Free memory is still 155.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:07:43,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.87 ms. Allocated memory is still 174.1 MB. Free memory was 154.5 MB in the beginning and 153.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:07:43,087 INFO L168 Benchmark]: Boogie Preprocessor took 10.39 ms. Allocated memory is still 174.1 MB. Free memory was 153.0 MB in the beginning and 152.0 MB in the end (delta: 993.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:07:43,088 INFO L168 Benchmark]: RCFGBuilder took 157.31 ms. Allocated memory is still 174.1 MB. Free memory was 152.0 MB in the beginning and 142.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 19:07:43,088 INFO L168 Benchmark]: TraceAbstraction took 902395.29 ms. Allocated memory was 174.1 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 141.9 MB in the beginning and 4.1 GB in the end (delta: -3.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 19:07:43,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.39 ms. Allocated memory is still 174.1 MB. Free memory is still 155.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.87 ms. Allocated memory is still 174.1 MB. Free memory was 154.5 MB in the beginning and 153.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.39 ms. Allocated memory is still 174.1 MB. Free memory was 153.0 MB in the beginning and 152.0 MB in the end (delta: 993.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 157.31 ms. Allocated memory is still 174.1 MB. Free memory was 152.0 MB in the beginning and 142.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 902395.29 ms. Allocated memory was 174.1 MB in the beginning and 5.7 GB in the end (delta: 5.6 GB). Free memory was 141.9 MB in the beginning and 4.1 GB in the end (delta: -3.9 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 200859, positive: 193580, positive conditional: 193580, positive unconditional: 0, negative: 7279, negative conditional: 7279, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 193580, positive: 193580, positive conditional: 0, positive unconditional: 193580, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 504, positive: 504, positive conditional: 0, positive unconditional: 504, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 504, positive: 420, positive conditional: 0, positive unconditional: 420, negative: 84, negative conditional: 0, negative unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 84, positive: 84, positive conditional: 0, positive unconditional: 84, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 230, positive: 230, positive conditional: 0, positive unconditional: 230, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 193580, positive: 193076, positive conditional: 0, positive unconditional: 193076, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 504, unknown conditional: 0, unknown unconditional: 504] , Statistics on independence cache: Total cache size (in pairs): 504, Positive cache size: 504, Positive conditional cache size: 0, Positive unconditional cache size: 504, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 7279 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 10]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 11]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 14]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 58 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 902268.9ms, OverallIterations: 325, TraceHistogramMax: 2, EmptinessCheckTime: 5163.5ms, AutomataDifference: 40019.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1836.8ms, PartialOrderReductionTime: 1806.3ms, HoareTripleCheckerStatistics: 14535 SDtfs, 4171 SDslu, 40844 SDs, 0 SdLazy, 42056 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15467.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9818 GetRequests, 7971 SyntacticMatches, 567 SemanticMatches, 1280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7060.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27308occurred in iteration=0, InterpolantAutomatonStates: 1928, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48818.4ms AutomataMinimizationTime, 324 MinimizatonAttempts, 371702 StatesRemovedByMinimization, 324 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1717.3ms SsaConstructionTime, 4887.3ms SatisfiabilityAnalysisTime, 53663.3ms InterpolantComputationTime, 18146 NumberOfCodeBlocks, 18146 NumberOfCodeBlocksAsserted, 800 NumberOfCheckSat, 17578 ConstructedInterpolants, 0 QuantifiedInterpolants, 126186 SizeOfPredicates, 0 NumberOfNonLiveVariables, 33946 ConjunctsInSsa, 3684 ConjunctsInUnsatCore, 568 InterpolantComputations, 80 PerfectInterpolantSequences, 1062/1850 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown