/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-sub08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:52:52,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:52:52,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:52:52,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:52:52,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:52:52,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:52:52,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:52:52,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:52:52,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:52:52,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:52:52,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:52:52,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:52:52,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:52:52,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:52:52,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:52:52,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:52:52,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:52:52,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:52:52,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:52:52,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:52:52,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:52:52,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:52:52,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:52:52,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:52:52,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 18:52:52,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 18:52:52,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 18:52:52,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 18:52:52,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 18:52:52,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 18:52:52,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:52:52,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:52:52,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:52:52,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:52:52,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:52:52,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:52:52,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:52:52,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:52:52,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:52:52,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:52:52,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:52:52,222 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 18:52:52,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:52:52,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:52:52,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:52:52,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:52:52,254 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:52:52,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:52:52,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:52:52,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:52:52,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:52:52,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:52:52,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:52:52,257 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:52:52,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:52:52,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:52:52,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:52:52,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:52:52,486 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:52:52,487 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:52:52,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub08.bpl [2021-08-21 18:52:52,488 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub08.bpl' [2021-08-21 18:52:52,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:52:52,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:52:52,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:52:52,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:52:52,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:52:52,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:52:52,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:52:52,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:52:52,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:52:52,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:52:52,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:52:52,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:52:52,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:52:52,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/1) ... [2021-08-21 18:52:52,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:52:52,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:52,564 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 18:52:52,576 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 18:52:52,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:52:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:52:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:52:52,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 18:52:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 18:52:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 18:52:52,605 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 18:52:52,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:52:52,693 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 18:52:52,694 INFO L202 PluginConnector]: Adding new model add-sub08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:52:52 BoogieIcfgContainer [2021-08-21 18:52:52,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:52:52,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:52:52,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:52:52,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:52:52,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:52:52" (1/2) ... [2021-08-21 18:52:52,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f074d41 and model type add-sub08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:52:52, skipping insertion in model container [2021-08-21 18:52:52,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:52:52" (2/2) ... [2021-08-21 18:52:52,699 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub08.bpl [2021-08-21 18:52:52,702 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:52:52,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:52:52,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:52:52,702 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:52:52,738 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,738 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,739 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,740 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,741 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,741 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,741 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,741 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,741 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,742 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,743 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,744 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,753 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,754 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,757 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,759 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,760 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,762 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,763 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,765 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,767 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork6_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,770 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork7_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:52:52,796 INFO L148 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2021-08-21 18:52:52,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:52:52,824 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 18:52:52,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-21 18:52:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 109228 states, 75095 states have (on average 1.8423463612757174) internal successors, (138351), 109227 states have internal predecessors, (138351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:58,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:58,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:58,599 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:52:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 403734656, now seen corresponding path program 1 times [2021-08-21 18:52:58,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:58,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374192371] [2021-08-21 18:52:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:58,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:58,734 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 18:52:58,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:58,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374192371] [2021-08-21 18:52:58,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374192371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:58,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:58,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 18:52:58,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858862322] [2021-08-21 18:52:58,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:52:58,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:52:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:52:58,976 INFO L87 Difference]: Start difference. First operand has 109228 states, 75095 states have (on average 1.8423463612757174) internal successors, (138351), 109227 states have internal predecessors, (138351), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 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 18:52:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:59,664 INFO L93 Difference]: Finished difference Result 122348 states and 156386 transitions. [2021-08-21 18:52:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:52:59,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 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 18:52:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:59,746 INFO L225 Difference]: With dead ends: 122348 [2021-08-21 18:52:59,746 INFO L226 Difference]: Without dead ends: 13895 [2021-08-21 18:52:59,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:52:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13895 states. [2021-08-21 18:53:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13895 to 13146. [2021-08-21 18:53:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13146 states, 13145 states have (on average 1.503233168505135) internal successors, (19760), 13145 states have internal predecessors, (19760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13146 states to 13146 states and 19760 transitions. [2021-08-21 18:53:00,099 INFO L78 Accepts]: Start accepts. Automaton has 13146 states and 19760 transitions. Word has length 26 [2021-08-21 18:53:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,100 INFO L470 AbstractCegarLoop]: Abstraction has 13146 states and 19760 transitions. [2021-08-21 18:53:00,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 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 18:53:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 13146 states and 19760 transitions. [2021-08-21 18:53:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:00,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:00,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:53:00,133 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,134 INFO L82 PathProgramCache]: Analyzing trace with hash 76459388, now seen corresponding path program 1 times [2021-08-21 18:53:00,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878452642] [2021-08-21 18:53:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:00,223 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 18:53:00,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:00,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878452642] [2021-08-21 18:53:00,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878452642] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:00,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:00,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:00,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789231490] [2021-08-21 18:53:00,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:00,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:00,227 INFO L87 Difference]: Start difference. First operand 13146 states and 19760 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:00,356 INFO L93 Difference]: Finished difference Result 14172 states and 21780 transitions. [2021-08-21 18:53:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:00,562 INFO L225 Difference]: With dead ends: 14172 [2021-08-21 18:53:00,562 INFO L226 Difference]: Without dead ends: 14163 [2021-08-21 18:53:00,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2021-08-21 18:53:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 13160. [2021-08-21 18:53:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 1.5069534159130633) internal successors, (19830), 13159 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 19830 transitions. [2021-08-21 18:53:00,761 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 19830 transitions. Word has length 29 [2021-08-21 18:53:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,761 INFO L470 AbstractCegarLoop]: Abstraction has 13160 states and 19830 transitions. [2021-08-21 18:53:00,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 19830 transitions. [2021-08-21 18:53:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:00,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,781 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] [2021-08-21 18:53:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:53:00,781 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash 213608824, now seen corresponding path program 1 times [2021-08-21 18:53:00,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107639408] [2021-08-21 18:53:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:00,998 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 18:53:00,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:00,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107639408] [2021-08-21 18:53:00,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107639408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:00,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:00,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:00,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209290465] [2021-08-21 18:53:00,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:00,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:01,000 INFO L87 Difference]: Start difference. First operand 13160 states and 19830 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:01,149 INFO L93 Difference]: Finished difference Result 14270 states and 22080 transitions. [2021-08-21 18:53:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:01,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:01,231 INFO L225 Difference]: With dead ends: 14270 [2021-08-21 18:53:01,231 INFO L226 Difference]: Without dead ends: 14261 [2021-08-21 18:53:01,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14261 states. [2021-08-21 18:53:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14261 to 13191. [2021-08-21 18:53:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13191 states, 13190 states have (on average 1.5156937073540562) internal successors, (19992), 13190 states have internal predecessors, (19992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13191 states to 13191 states and 19992 transitions. [2021-08-21 18:53:01,483 INFO L78 Accepts]: Start accepts. Automaton has 13191 states and 19992 transitions. Word has length 29 [2021-08-21 18:53:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:01,483 INFO L470 AbstractCegarLoop]: Abstraction has 13191 states and 19992 transitions. [2021-08-21 18:53:01,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13191 states and 19992 transitions. [2021-08-21 18:53:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:01,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:01,502 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] [2021-08-21 18:53:01,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:53:01,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash -971044552, now seen corresponding path program 1 times [2021-08-21 18:53:01,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:01,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739661730] [2021-08-21 18:53:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:01,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,544 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 18:53:01,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739661730] [2021-08-21 18:53:01,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739661730] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:01,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:01,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119734518] [2021-08-21 18:53:01,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:01,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:01,546 INFO L87 Difference]: Start difference. First operand 13191 states and 19992 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:01,614 INFO L93 Difference]: Finished difference Result 14323 states and 22265 transitions. [2021-08-21 18:53:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:01,638 INFO L225 Difference]: With dead ends: 14323 [2021-08-21 18:53:01,638 INFO L226 Difference]: Without dead ends: 14314 [2021-08-21 18:53:01,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14314 states. [2021-08-21 18:53:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14314 to 13213. [2021-08-21 18:53:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13213 states, 13212 states have (on average 1.5224038752649107) internal successors, (20114), 13212 states have internal predecessors, (20114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13213 states to 13213 states and 20114 transitions. [2021-08-21 18:53:01,882 INFO L78 Accepts]: Start accepts. Automaton has 13213 states and 20114 transitions. Word has length 29 [2021-08-21 18:53:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:01,883 INFO L470 AbstractCegarLoop]: Abstraction has 13213 states and 20114 transitions. [2021-08-21 18:53:01,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 13213 states and 20114 transitions. [2021-08-21 18:53:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:01,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:01,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:01,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:53:01,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash 222310980, now seen corresponding path program 1 times [2021-08-21 18:53:01,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:01,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220660802] [2021-08-21 18:53:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:01,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,938 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 18:53:01,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220660802] [2021-08-21 18:53:01,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220660802] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:01,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:01,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:01,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947274128] [2021-08-21 18:53:01,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:01,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:01,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:01,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:01,939 INFO L87 Difference]: Start difference. First operand 13213 states and 20114 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:02,001 INFO L93 Difference]: Finished difference Result 14367 states and 22317 transitions. [2021-08-21 18:53:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:02,026 INFO L225 Difference]: With dead ends: 14367 [2021-08-21 18:53:02,027 INFO L226 Difference]: Without dead ends: 14358 [2021-08-21 18:53:02,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14358 states. [2021-08-21 18:53:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14358 to 13241. [2021-08-21 18:53:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13241 states, 13240 states have (on average 1.5275679758308156) internal successors, (20225), 13240 states have internal predecessors, (20225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13241 states to 13241 states and 20225 transitions. [2021-08-21 18:53:02,256 INFO L78 Accepts]: Start accepts. Automaton has 13241 states and 20225 transitions. Word has length 29 [2021-08-21 18:53:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:02,256 INFO L470 AbstractCegarLoop]: Abstraction has 13241 states and 20225 transitions. [2021-08-21 18:53:02,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 13241 states and 20225 transitions. [2021-08-21 18:53:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:02,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:02,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:02,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:53:02,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1561401528, now seen corresponding path program 1 times [2021-08-21 18:53:02,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:02,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132440880] [2021-08-21 18:53:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:02,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:02,312 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 18:53:02,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:02,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132440880] [2021-08-21 18:53:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132440880] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:02,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152763408] [2021-08-21 18:53:02,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:02,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:02,313 INFO L87 Difference]: Start difference. First operand 13241 states and 20225 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:02,381 INFO L93 Difference]: Finished difference Result 14378 states and 22464 transitions. [2021-08-21 18:53:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:02,407 INFO L225 Difference]: With dead ends: 14378 [2021-08-21 18:53:02,407 INFO L226 Difference]: Without dead ends: 14369 [2021-08-21 18:53:02,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14369 states. [2021-08-21 18:53:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14369 to 13264. [2021-08-21 18:53:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13263 states have (on average 1.53328809469954) internal successors, (20336), 13263 states have internal predecessors, (20336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 20336 transitions. [2021-08-21 18:53:02,612 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 20336 transitions. Word has length 29 [2021-08-21 18:53:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:02,612 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 20336 transitions. [2021-08-21 18:53:02,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 20336 transitions. [2021-08-21 18:53:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:02,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:02,631 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] [2021-08-21 18:53:02,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:53:02,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1927789624, now seen corresponding path program 1 times [2021-08-21 18:53:02,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:02,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806734912] [2021-08-21 18:53:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:02,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:02,730 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 18:53:02,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:02,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806734912] [2021-08-21 18:53:02,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806734912] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:02,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:02,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:02,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856961734] [2021-08-21 18:53:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:02,732 INFO L87 Difference]: Start difference. First operand 13264 states and 20336 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:02,832 INFO L93 Difference]: Finished difference Result 14304 states and 22289 transitions. [2021-08-21 18:53:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:02,888 INFO L225 Difference]: With dead ends: 14304 [2021-08-21 18:53:02,889 INFO L226 Difference]: Without dead ends: 14295 [2021-08-21 18:53:02,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14295 states. [2021-08-21 18:53:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14295 to 13286. [2021-08-21 18:53:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13286 states, 13285 states have (on average 1.5363191569439216) internal successors, (20410), 13285 states have internal predecessors, (20410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13286 states to 13286 states and 20410 transitions. [2021-08-21 18:53:03,198 INFO L78 Accepts]: Start accepts. Automaton has 13286 states and 20410 transitions. Word has length 29 [2021-08-21 18:53:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,198 INFO L470 AbstractCegarLoop]: Abstraction has 13286 states and 20410 transitions. [2021-08-21 18:53:03,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13286 states and 20410 transitions. [2021-08-21 18:53:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:03,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:53:03,217 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash -722255220, now seen corresponding path program 1 times [2021-08-21 18:53:03,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:03,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097831243] [2021-08-21 18:53:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:03,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,269 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 18:53:03,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097831243] [2021-08-21 18:53:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097831243] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:03,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878305699] [2021-08-21 18:53:03,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:03,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:03,270 INFO L87 Difference]: Start difference. First operand 13286 states and 20410 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:03,334 INFO L93 Difference]: Finished difference Result 14403 states and 22342 transitions. [2021-08-21 18:53:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:03,359 INFO L225 Difference]: With dead ends: 14403 [2021-08-21 18:53:03,359 INFO L226 Difference]: Without dead ends: 14390 [2021-08-21 18:53:03,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14390 states. [2021-08-21 18:53:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14390 to 13311. [2021-08-21 18:53:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13311 states, 13310 states have (on average 1.5384673178061608) internal successors, (20477), 13310 states have internal predecessors, (20477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13311 states to 13311 states and 20477 transitions. [2021-08-21 18:53:03,581 INFO L78 Accepts]: Start accepts. Automaton has 13311 states and 20477 transitions. Word has length 29 [2021-08-21 18:53:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,581 INFO L470 AbstractCegarLoop]: Abstraction has 13311 states and 20477 transitions. [2021-08-21 18:53:03,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 13311 states and 20477 transitions. [2021-08-21 18:53:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:03,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,600 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:03,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 18:53:03,600 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash 734892428, now seen corresponding path program 1 times [2021-08-21 18:53:03,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:03,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250767980] [2021-08-21 18:53:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:03,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,636 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 18:53:03,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250767980] [2021-08-21 18:53:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250767980] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:03,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:03,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:53:03,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428043282] [2021-08-21 18:53:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:53:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:53:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:03,638 INFO L87 Difference]: Start difference. First operand 13311 states and 20477 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:03,702 INFO L93 Difference]: Finished difference Result 14497 states and 22838 transitions. [2021-08-21 18:53:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:53:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:03,724 INFO L225 Difference]: With dead ends: 14497 [2021-08-21 18:53:03,724 INFO L226 Difference]: Without dead ends: 14488 [2021-08-21 18:53:03,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:53:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14488 states. [2021-08-21 18:53:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14488 to 13338. [2021-08-21 18:53:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 1.5445002624278323) internal successors, (20599), 13337 states have internal predecessors, (20599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 20599 transitions. [2021-08-21 18:53:03,886 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 20599 transitions. Word has length 29 [2021-08-21 18:53:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,886 INFO L470 AbstractCegarLoop]: Abstraction has 13338 states and 20599 transitions. [2021-08-21 18:53:03,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 18:53:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 20599 transitions. [2021-08-21 18:53:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:03,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,904 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 18:53:03,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 18:53:03,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash -68138244, now seen corresponding path program 1 times [2021-08-21 18:53:03,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:03,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551191660] [2021-08-21 18:53:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:03,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,947 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 18:53:03,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551191660] [2021-08-21 18:53:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551191660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:03,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:03,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:03,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969145740] [2021-08-21 18:53:03,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:03,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:03,948 INFO L87 Difference]: Start difference. First operand 13338 states and 20599 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:04,045 INFO L93 Difference]: Finished difference Result 14733 states and 23390 transitions. [2021-08-21 18:53:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:04,067 INFO L225 Difference]: With dead ends: 14733 [2021-08-21 18:53:04,067 INFO L226 Difference]: Without dead ends: 14724 [2021-08-21 18:53:04,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14724 states. [2021-08-21 18:53:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14724 to 13344. [2021-08-21 18:53:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 13343 states have (on average 1.5442554148242524) internal successors, (20605), 13343 states have internal predecessors, (20605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 20605 transitions. [2021-08-21 18:53:04,287 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 20605 transitions. Word has length 32 [2021-08-21 18:53:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 20605 transitions. [2021-08-21 18:53:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 20605 transitions. [2021-08-21 18:53:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:04,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:04,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:04,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 18:53:04,306 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1252791620, now seen corresponding path program 1 times [2021-08-21 18:53:04,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:04,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431008693] [2021-08-21 18:53:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:04,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:04,349 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 18:53:04,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:04,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431008693] [2021-08-21 18:53:04,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431008693] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:04,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:04,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:04,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522005577] [2021-08-21 18:53:04,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:04,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,350 INFO L87 Difference]: Start difference. First operand 13344 states and 20605 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:04,447 INFO L93 Difference]: Finished difference Result 14787 states and 23576 transitions. [2021-08-21 18:53:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:04,470 INFO L225 Difference]: With dead ends: 14787 [2021-08-21 18:53:04,470 INFO L226 Difference]: Without dead ends: 14778 [2021-08-21 18:53:04,470 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 18:53:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14778 states. [2021-08-21 18:53:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14778 to 13386. [2021-08-21 18:53:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13386 states, 13385 states have (on average 1.5558460963765408) internal successors, (20825), 13385 states have internal predecessors, (20825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13386 states to 13386 states and 20825 transitions. [2021-08-21 18:53:04,632 INFO L78 Accepts]: Start accepts. Automaton has 13386 states and 20825 transitions. Word has length 32 [2021-08-21 18:53:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:04,632 INFO L470 AbstractCegarLoop]: Abstraction has 13386 states and 20825 transitions. [2021-08-21 18:53:04,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13386 states and 20825 transitions. [2021-08-21 18:53:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:04,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:04,649 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 18:53:04,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:53:04,649 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash -59436088, now seen corresponding path program 1 times [2021-08-21 18:53:04,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:04,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508871159] [2021-08-21 18:53:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:04,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:04,704 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 18:53:04,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:04,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508871159] [2021-08-21 18:53:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508871159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:04,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:04,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:04,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339822137] [2021-08-21 18:53:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:04,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,705 INFO L87 Difference]: Start difference. First operand 13386 states and 20825 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:04,796 INFO L93 Difference]: Finished difference Result 14823 states and 23603 transitions. [2021-08-21 18:53:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:04,817 INFO L225 Difference]: With dead ends: 14823 [2021-08-21 18:53:04,817 INFO L226 Difference]: Without dead ends: 14814 [2021-08-21 18:53:04,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14814 states. [2021-08-21 18:53:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14814 to 13403. [2021-08-21 18:53:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13403 states, 13402 states have (on average 1.5593195045515595) internal successors, (20898), 13402 states have internal predecessors, (20898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 20898 transitions. [2021-08-21 18:53:05,010 INFO L78 Accepts]: Start accepts. Automaton has 13403 states and 20898 transitions. Word has length 32 [2021-08-21 18:53:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:05,010 INFO L470 AbstractCegarLoop]: Abstraction has 13403 states and 20898 transitions. [2021-08-21 18:53:05,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 13403 states and 20898 transitions. [2021-08-21 18:53:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:05,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:05,029 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 18:53:05,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 18:53:05,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1279654460, now seen corresponding path program 1 times [2021-08-21 18:53:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:05,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314380851] [2021-08-21 18:53:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:05,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:05,077 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 18:53:05,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:05,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314380851] [2021-08-21 18:53:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314380851] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:05,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:05,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:05,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917802407] [2021-08-21 18:53:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,079 INFO L87 Difference]: Start difference. First operand 13403 states and 20898 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:05,180 INFO L93 Difference]: Finished difference Result 14817 states and 23685 transitions. [2021-08-21 18:53:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:05,200 INFO L225 Difference]: With dead ends: 14817 [2021-08-21 18:53:05,201 INFO L226 Difference]: Without dead ends: 14808 [2021-08-21 18:53:05,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14808 states. [2021-08-21 18:53:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14808 to 13417. [2021-08-21 18:53:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13417 states, 13416 states have (on average 1.562984496124031) internal successors, (20969), 13416 states have internal predecessors, (20969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13417 states to 13417 states and 20969 transitions. [2021-08-21 18:53:05,358 INFO L78 Accepts]: Start accepts. Automaton has 13417 states and 20969 transitions. Word has length 32 [2021-08-21 18:53:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:05,358 INFO L470 AbstractCegarLoop]: Abstraction has 13417 states and 20969 transitions. [2021-08-21 18:53:05,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13417 states and 20969 transitions. [2021-08-21 18:53:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:05,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:05,375 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:05,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 18:53:05,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1646042556, now seen corresponding path program 1 times [2021-08-21 18:53:05,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:05,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874788550] [2021-08-21 18:53:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:05,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:05,433 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 18:53:05,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:05,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874788550] [2021-08-21 18:53:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874788550] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:05,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758727853] [2021-08-21 18:53:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,435 INFO L87 Difference]: Start difference. First operand 13417 states and 20969 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:05,520 INFO L93 Difference]: Finished difference Result 14719 states and 23420 transitions. [2021-08-21 18:53:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:05,541 INFO L225 Difference]: With dead ends: 14719 [2021-08-21 18:53:05,541 INFO L226 Difference]: Without dead ends: 14710 [2021-08-21 18:53:05,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 18:53:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14710 states. [2021-08-21 18:53:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14710 to 13422. [2021-08-21 18:53:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13422 states, 13421 states have (on average 1.5641904478056776) internal successors, (20993), 13421 states have internal predecessors, (20993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 20993 transitions. [2021-08-21 18:53:05,711 INFO L78 Accepts]: Start accepts. Automaton has 13422 states and 20993 transitions. Word has length 32 [2021-08-21 18:53:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 13422 states and 20993 transitions. [2021-08-21 18:53:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13422 states and 20993 transitions. [2021-08-21 18:53:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:05,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:05,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:05,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 18:53:05,729 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1004002288, now seen corresponding path program 1 times [2021-08-21 18:53:05,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:05,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797270950] [2021-08-21 18:53:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:05,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:05,771 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 18:53:05,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:05,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797270950] [2021-08-21 18:53:05,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797270950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:05,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:05,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:05,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326948022] [2021-08-21 18:53:05,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:05,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,772 INFO L87 Difference]: Start difference. First operand 13422 states and 20993 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:05,858 INFO L93 Difference]: Finished difference Result 14799 states and 23440 transitions. [2021-08-21 18:53:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:05,877 INFO L225 Difference]: With dead ends: 14799 [2021-08-21 18:53:05,878 INFO L226 Difference]: Without dead ends: 14786 [2021-08-21 18:53:05,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2021-08-21 18:53:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 13428. [2021-08-21 18:53:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 1.5653533924182617) internal successors, (21018), 13427 states have internal predecessors, (21018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 21018 transitions. [2021-08-21 18:53:06,067 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 21018 transitions. Word has length 32 [2021-08-21 18:53:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,067 INFO L470 AbstractCegarLoop]: Abstraction has 13428 states and 21018 transitions. [2021-08-21 18:53:06,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 21018 transitions. [2021-08-21 18:53:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 18:53:06,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,086 INFO L82 PathProgramCache]: Analyzing trace with hash 453145360, now seen corresponding path program 1 times [2021-08-21 18:53:06,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976506893] [2021-08-21 18:53:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,133 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 18:53:06,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976506893] [2021-08-21 18:53:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976506893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534467242] [2021-08-21 18:53:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:06,135 INFO L87 Difference]: Start difference. First operand 13428 states and 21018 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,230 INFO L93 Difference]: Finished difference Result 14885 states and 23923 transitions. [2021-08-21 18:53:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,250 INFO L225 Difference]: With dead ends: 14885 [2021-08-21 18:53:06,250 INFO L226 Difference]: Without dead ends: 14876 [2021-08-21 18:53:06,250 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 18:53:06,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14876 states. [2021-08-21 18:53:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14876 to 13442. [2021-08-21 18:53:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13442 states, 13441 states have (on average 1.5663269102001338) internal successors, (21053), 13441 states have internal predecessors, (21053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 21053 transitions. [2021-08-21 18:53:06,442 INFO L78 Accepts]: Start accepts. Automaton has 13442 states and 21053 transitions. Word has length 32 [2021-08-21 18:53:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,442 INFO L470 AbstractCegarLoop]: Abstraction has 13442 states and 21053 transitions. [2021-08-21 18:53:06,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 13442 states and 21053 transitions. [2021-08-21 18:53:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:06,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 18:53:06,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -853666944, now seen corresponding path program 2 times [2021-08-21 18:53:06,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91867788] [2021-08-21 18:53:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,504 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 18:53:06,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91867788] [2021-08-21 18:53:06,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91867788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066335773] [2021-08-21 18:53:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:06,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:06,516 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 18:53:06,520 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 18:53:06,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:06,897 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 18:53:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066335773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:06,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:06,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:06,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189272774] [2021-08-21 18:53:06,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:06,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:06,899 INFO L87 Difference]: Start difference. First operand 13442 states and 21053 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:07,015 INFO L93 Difference]: Finished difference Result 14678 states and 23571 transitions. [2021-08-21 18:53:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:07,041 INFO L225 Difference]: With dead ends: 14678 [2021-08-21 18:53:07,041 INFO L226 Difference]: Without dead ends: 14669 [2021-08-21 18:53:07,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14669 states. [2021-08-21 18:53:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14669 to 13478. [2021-08-21 18:53:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13478 states, 13477 states have (on average 1.5752021963344958) internal successors, (21229), 13477 states have internal predecessors, (21229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13478 states to 13478 states and 21229 transitions. [2021-08-21 18:53:07,262 INFO L78 Accepts]: Start accepts. Automaton has 13478 states and 21229 transitions. Word has length 32 [2021-08-21 18:53:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:07,262 INFO L470 AbstractCegarLoop]: Abstraction has 13478 states and 21229 transitions. [2021-08-21 18:53:07,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13478 states and 21229 transitions. [2021-08-21 18:53:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:07,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:07,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:07,300 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 18:53:07,492 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,SelfDestructingSolverStorable16 [2021-08-21 18:53:07,493 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 52157760, now seen corresponding path program 1 times [2021-08-21 18:53:07,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:07,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73644418] [2021-08-21 18:53:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:07,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:07,540 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 18:53:07,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:07,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73644418] [2021-08-21 18:53:07,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73644418] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:07,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:07,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:07,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369475546] [2021-08-21 18:53:07,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:07,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:07,541 INFO L87 Difference]: Start difference. First operand 13478 states and 21229 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:07,644 INFO L93 Difference]: Finished difference Result 15062 states and 24675 transitions. [2021-08-21 18:53:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:07,668 INFO L225 Difference]: With dead ends: 15062 [2021-08-21 18:53:07,668 INFO L226 Difference]: Without dead ends: 15053 [2021-08-21 18:53:07,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15053 states. [2021-08-21 18:53:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15053 to 13564. [2021-08-21 18:53:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13564 states, 13563 states have (on average 1.5972130059721301) internal successors, (21663), 13563 states have internal predecessors, (21663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13564 states to 13564 states and 21663 transitions. [2021-08-21 18:53:07,871 INFO L78 Accepts]: Start accepts. Automaton has 13564 states and 21663 transitions. Word has length 32 [2021-08-21 18:53:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:07,871 INFO L470 AbstractCegarLoop]: Abstraction has 13564 states and 21663 transitions. [2021-08-21 18:53:07,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 13564 states and 21663 transitions. [2021-08-21 18:53:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:07,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:07,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 18:53:07,889 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1245513292, now seen corresponding path program 1 times [2021-08-21 18:53:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:07,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281982973] [2021-08-21 18:53:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:07,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:07,931 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 18:53:07,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:07,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281982973] [2021-08-21 18:53:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281982973] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:07,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:07,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163397609] [2021-08-21 18:53:07,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:07,933 INFO L87 Difference]: Start difference. First operand 13564 states and 21663 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,032 INFO L93 Difference]: Finished difference Result 15144 states and 24885 transitions. [2021-08-21 18:53:08,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,056 INFO L225 Difference]: With dead ends: 15144 [2021-08-21 18:53:08,056 INFO L226 Difference]: Without dead ends: 15135 [2021-08-21 18:53:08,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15135 states. [2021-08-21 18:53:08,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15135 to 13615. [2021-08-21 18:53:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 13614 states have (on average 1.6065814602614956) internal successors, (21872), 13614 states have internal predecessors, (21872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 21872 transitions. [2021-08-21 18:53:08,256 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 21872 transitions. Word has length 32 [2021-08-21 18:53:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,256 INFO L470 AbstractCegarLoop]: Abstraction has 13615 states and 21872 transitions. [2021-08-21 18:53:08,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 21872 transitions. [2021-08-21 18:53:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:08,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 18:53:08,274 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1710363456, now seen corresponding path program 1 times [2021-08-21 18:53:08,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367388155] [2021-08-21 18:53:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,313 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 18:53:08,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367388155] [2021-08-21 18:53:08,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367388155] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:08,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771495346] [2021-08-21 18:53:08,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:08,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:08,314 INFO L87 Difference]: Start difference. First operand 13615 states and 21872 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,414 INFO L93 Difference]: Finished difference Result 15165 states and 25081 transitions. [2021-08-21 18:53:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,435 INFO L225 Difference]: With dead ends: 15165 [2021-08-21 18:53:08,435 INFO L226 Difference]: Without dead ends: 15156 [2021-08-21 18:53:08,435 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 18:53:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15156 states. [2021-08-21 18:53:08,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15156 to 13654. [2021-08-21 18:53:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13654 states, 13653 states have (on average 1.6156888595912986) internal successors, (22059), 13653 states have internal predecessors, (22059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13654 states to 13654 states and 22059 transitions. [2021-08-21 18:53:08,633 INFO L78 Accepts]: Start accepts. Automaton has 13654 states and 22059 transitions. Word has length 32 [2021-08-21 18:53:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,633 INFO L470 AbstractCegarLoop]: Abstraction has 13654 states and 22059 transitions. [2021-08-21 18:53:08,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13654 states and 22059 transitions. [2021-08-21 18:53:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:08,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,652 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 18:53:08,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 18:53:08,652 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1343975360, now seen corresponding path program 1 times [2021-08-21 18:53:08,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963975070] [2021-08-21 18:53:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,695 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 18:53:08,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963975070] [2021-08-21 18:53:08,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963975070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:08,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:08,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:08,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550395519] [2021-08-21 18:53:08,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:08,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:08,696 INFO L87 Difference]: Start difference. First operand 13654 states and 22059 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,788 INFO L93 Difference]: Finished difference Result 15090 states and 24886 transitions. [2021-08-21 18:53:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:08,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,809 INFO L225 Difference]: With dead ends: 15090 [2021-08-21 18:53:08,809 INFO L226 Difference]: Without dead ends: 15081 [2021-08-21 18:53:08,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 18:53:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15081 states. [2021-08-21 18:53:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15081 to 13672. [2021-08-21 18:53:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13672 states, 13671 states have (on average 1.619267061663375) internal successors, (22137), 13671 states have internal predecessors, (22137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13672 states to 13672 states and 22137 transitions. [2021-08-21 18:53:09,000 INFO L78 Accepts]: Start accepts. Automaton has 13672 states and 22137 transitions. Word has length 32 [2021-08-21 18:53:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,000 INFO L470 AbstractCegarLoop]: Abstraction has 13672 states and 22137 transitions. [2021-08-21 18:53:09,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 13672 states and 22137 transitions. [2021-08-21 18:53:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:09,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:09,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 18:53:09,018 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash 300947092, now seen corresponding path program 1 times [2021-08-21 18:53:09,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932360902] [2021-08-21 18:53:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,051 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 18:53:09,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:09,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932360902] [2021-08-21 18:53:09,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932360902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:09,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:09,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:09,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908145836] [2021-08-21 18:53:09,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:09,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:09,052 INFO L87 Difference]: Start difference. First operand 13672 states and 22137 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,133 INFO L93 Difference]: Finished difference Result 15191 states and 24971 transitions. [2021-08-21 18:53:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,158 INFO L225 Difference]: With dead ends: 15191 [2021-08-21 18:53:09,158 INFO L226 Difference]: Without dead ends: 15178 [2021-08-21 18:53:09,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15178 states. [2021-08-21 18:53:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15178 to 13697. [2021-08-21 18:53:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13697 states, 13696 states have (on average 1.6228095794392523) internal successors, (22226), 13696 states have internal predecessors, (22226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13697 states to 13697 states and 22226 transitions. [2021-08-21 18:53:09,338 INFO L78 Accepts]: Start accepts. Automaton has 13697 states and 22226 transitions. Word has length 32 [2021-08-21 18:53:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 13697 states and 22226 transitions. [2021-08-21 18:53:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 13697 states and 22226 transitions. [2021-08-21 18:53:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:09,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:09,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 18:53:09,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1758094740, now seen corresponding path program 1 times [2021-08-21 18:53:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134781318] [2021-08-21 18:53:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,396 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 18:53:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134781318] [2021-08-21 18:53:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134781318] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:09,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:09,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912358536] [2021-08-21 18:53:09,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:09,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:09,397 INFO L87 Difference]: Start difference. First operand 13697 states and 22226 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,482 INFO L93 Difference]: Finished difference Result 15314 states and 25620 transitions. [2021-08-21 18:53:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,503 INFO L225 Difference]: With dead ends: 15314 [2021-08-21 18:53:09,503 INFO L226 Difference]: Without dead ends: 15305 [2021-08-21 18:53:09,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15305 states. [2021-08-21 18:53:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15305 to 13761. [2021-08-21 18:53:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13761 states, 13760 states have (on average 1.633357558139535) internal successors, (22475), 13760 states have internal predecessors, (22475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13761 states to 13761 states and 22475 transitions. [2021-08-21 18:53:09,680 INFO L78 Accepts]: Start accepts. Automaton has 13761 states and 22475 transitions. Word has length 32 [2021-08-21 18:53:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,681 INFO L470 AbstractCegarLoop]: Abstraction has 13761 states and 22475 transitions. [2021-08-21 18:53:09,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 13761 states and 22475 transitions. [2021-08-21 18:53:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:09,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,700 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 18:53:09,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 18:53:09,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 256659320, now seen corresponding path program 2 times [2021-08-21 18:53:09,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059955744] [2021-08-21 18:53:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,750 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 18:53:09,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:09,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059955744] [2021-08-21 18:53:09,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059955744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817059993] [2021-08-21 18:53:09,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:09,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:09,753 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 18:53:09,780 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 18:53:09,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:10,025 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 18:53:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817059993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:10,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:10,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287018896] [2021-08-21 18:53:10,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:10,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:10,026 INFO L87 Difference]: Start difference. First operand 13761 states and 22475 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:10,127 INFO L93 Difference]: Finished difference Result 15065 states and 25215 transitions. [2021-08-21 18:53:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:10,147 INFO L225 Difference]: With dead ends: 15065 [2021-08-21 18:53:10,147 INFO L226 Difference]: Without dead ends: 15056 [2021-08-21 18:53:10,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2021-08-21 18:53:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 13791. [2021-08-21 18:53:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13791 states, 13790 states have (on average 1.639738941261784) internal successors, (22612), 13790 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13791 states to 13791 states and 22612 transitions. [2021-08-21 18:53:10,337 INFO L78 Accepts]: Start accepts. Automaton has 13791 states and 22612 transitions. Word has length 32 [2021-08-21 18:53:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:10,337 INFO L470 AbstractCegarLoop]: Abstraction has 13791 states and 22612 transitions. [2021-08-21 18:53:10,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 13791 states and 22612 transitions. [2021-08-21 18:53:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:10,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:10,354 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 18:53:10,370 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 18:53:10,555 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,SelfDestructingSolverStorable23 [2021-08-21 18:53:10,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash -526707460, now seen corresponding path program 2 times [2021-08-21 18:53:10,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:10,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6429751] [2021-08-21 18:53:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:10,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:10,600 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 18:53:10,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:10,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6429751] [2021-08-21 18:53:10,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6429751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862851380] [2021-08-21 18:53:10,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:10,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:10,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:10,605 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 18:53:10,607 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 18:53:10,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:10,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:10,884 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 18:53:10,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862851380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:10,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:10,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422843255] [2021-08-21 18:53:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:10,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:10,885 INFO L87 Difference]: Start difference. First operand 13791 states and 22612 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:10,984 INFO L93 Difference]: Finished difference Result 15181 states and 25505 transitions. [2021-08-21 18:53:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:11,004 INFO L225 Difference]: With dead ends: 15181 [2021-08-21 18:53:11,004 INFO L226 Difference]: Without dead ends: 15172 [2021-08-21 18:53:11,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15172 states. [2021-08-21 18:53:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15172 to 13826. [2021-08-21 18:53:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13826 states, 13825 states have (on average 1.6469439421338155) internal successors, (22769), 13825 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 18:53:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13826 states to 13826 states and 22769 transitions. [2021-08-21 18:53:11,196 INFO L78 Accepts]: Start accepts. Automaton has 13826 states and 22769 transitions. Word has length 32 [2021-08-21 18:53:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:11,197 INFO L470 AbstractCegarLoop]: Abstraction has 13826 states and 22769 transitions. [2021-08-21 18:53:11,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 13826 states and 22769 transitions. [2021-08-21 18:53:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:11,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:11,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:11,233 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 18:53:11,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,414 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1684405884, now seen corresponding path program 2 times [2021-08-21 18:53:11,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:11,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748014853] [2021-08-21 18:53:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:11,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:11,453 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 18:53:11,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:11,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748014853] [2021-08-21 18:53:11,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748014853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583653746] [2021-08-21 18:53:11,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:11,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:11,455 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 18:53:11,455 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 18:53:11,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:11,781 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 18:53:11,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583653746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:11,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:11,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233445726] [2021-08-21 18:53:11,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:11,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:11,783 INFO L87 Difference]: Start difference. First operand 13826 states and 22769 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:11,890 INFO L93 Difference]: Finished difference Result 15125 states and 25514 transitions. [2021-08-21 18:53:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:11,911 INFO L225 Difference]: With dead ends: 15125 [2021-08-21 18:53:11,911 INFO L226 Difference]: Without dead ends: 15116 [2021-08-21 18:53:11,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15116 states. [2021-08-21 18:53:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15116 to 13851. [2021-08-21 18:53:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13851 states, 13850 states have (on average 1.6537184115523467) internal successors, (22904), 13850 states have internal predecessors, (22904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13851 states to 13851 states and 22904 transitions. [2021-08-21 18:53:12,129 INFO L78 Accepts]: Start accepts. Automaton has 13851 states and 22904 transitions. Word has length 32 [2021-08-21 18:53:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:12,129 INFO L470 AbstractCegarLoop]: Abstraction has 13851 states and 22904 transitions. [2021-08-21 18:53:12,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13851 states and 22904 transitions. [2021-08-21 18:53:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:12,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:12,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:12,164 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 18:53:12,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:53:12,348 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1571128448, now seen corresponding path program 2 times [2021-08-21 18:53:12,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:12,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322185470] [2021-08-21 18:53:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:12,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:12,396 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 18:53:12,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:12,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322185470] [2021-08-21 18:53:12,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322185470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:12,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125271144] [2021-08-21 18:53:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:12,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:12,397 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 18:53:12,415 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 18:53:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:12,717 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 18:53:12,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125271144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:12,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:12,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767154543] [2021-08-21 18:53:12,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:12,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:12,719 INFO L87 Difference]: Start difference. First operand 13851 states and 22904 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:12,810 INFO L93 Difference]: Finished difference Result 15237 states and 25809 transitions. [2021-08-21 18:53:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:12,829 INFO L225 Difference]: With dead ends: 15237 [2021-08-21 18:53:12,829 INFO L226 Difference]: Without dead ends: 15228 [2021-08-21 18:53:12,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15228 states. [2021-08-21 18:53:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15228 to 13881. [2021-08-21 18:53:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13881 states, 13880 states have (on average 1.661599423631124) internal successors, (23063), 13880 states have internal predecessors, (23063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13881 states to 13881 states and 23063 transitions. [2021-08-21 18:53:12,984 INFO L78 Accepts]: Start accepts. Automaton has 13881 states and 23063 transitions. Word has length 32 [2021-08-21 18:53:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:12,984 INFO L470 AbstractCegarLoop]: Abstraction has 13881 states and 23063 transitions. [2021-08-21 18:53:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 13881 states and 23063 transitions. [2021-08-21 18:53:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:13,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:13,017 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 18:53:13,201 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,SelfDestructingSolverStorable26 [2021-08-21 18:53:13,202 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:13,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash 983060108, now seen corresponding path program 1 times [2021-08-21 18:53:13,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524976628] [2021-08-21 18:53:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,237 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 18:53:13,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524976628] [2021-08-21 18:53:13,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524976628] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:13,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:13,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:13,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381720390] [2021-08-21 18:53:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:13,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:13,239 INFO L87 Difference]: Start difference. First operand 13881 states and 23063 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,321 INFO L93 Difference]: Finished difference Result 15514 states and 26426 transitions. [2021-08-21 18:53:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:13,343 INFO L225 Difference]: With dead ends: 15514 [2021-08-21 18:53:13,343 INFO L226 Difference]: Without dead ends: 15505 [2021-08-21 18:53:13,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15505 states. [2021-08-21 18:53:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15505 to 13931. [2021-08-21 18:53:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13930 states have (on average 1.6704235463029433) internal successors, (23269), 13930 states have internal predecessors, (23269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 23269 transitions. [2021-08-21 18:53:13,508 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 23269 transitions. Word has length 32 [2021-08-21 18:53:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:13,508 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 23269 transitions. [2021-08-21 18:53:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 23269 transitions. [2021-08-21 18:53:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:13,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:13,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 18:53:13,525 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1972816640, now seen corresponding path program 1 times [2021-08-21 18:53:13,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415948162] [2021-08-21 18:53:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,559 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 18:53:13,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415948162] [2021-08-21 18:53:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415948162] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:13,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:13,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:13,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237921418] [2021-08-21 18:53:13,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:13,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:13,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:13,560 INFO L87 Difference]: Start difference. First operand 13931 states and 23269 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,647 INFO L93 Difference]: Finished difference Result 15535 states and 26620 transitions. [2021-08-21 18:53:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:13,670 INFO L225 Difference]: With dead ends: 15535 [2021-08-21 18:53:13,671 INFO L226 Difference]: Without dead ends: 15526 [2021-08-21 18:53:13,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-08-21 18:53:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 13974. [2021-08-21 18:53:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13974 states, 13973 states have (on average 1.6800973305660918) internal successors, (23476), 13973 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13974 states to 13974 states and 23476 transitions. [2021-08-21 18:53:13,843 INFO L78 Accepts]: Start accepts. Automaton has 13974 states and 23476 transitions. Word has length 32 [2021-08-21 18:53:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:13,843 INFO L470 AbstractCegarLoop]: Abstraction has 13974 states and 23476 transitions. [2021-08-21 18:53:13,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13974 states and 23476 transitions. [2021-08-21 18:53:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:13,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,860 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 18:53:13,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 18:53:13,861 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1606428544, now seen corresponding path program 1 times [2021-08-21 18:53:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895799445] [2021-08-21 18:53:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,896 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 18:53:13,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895799445] [2021-08-21 18:53:13,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895799445] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:13,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:13,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:13,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937580548] [2021-08-21 18:53:13,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:13,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:13,897 INFO L87 Difference]: Start difference. First operand 13974 states and 23476 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,980 INFO L93 Difference]: Finished difference Result 15463 states and 26440 transitions. [2021-08-21 18:53:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,003 INFO L225 Difference]: With dead ends: 15463 [2021-08-21 18:53:14,003 INFO L226 Difference]: Without dead ends: 15454 [2021-08-21 18:53:14,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2021-08-21 18:53:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 13999. [2021-08-21 18:53:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13999 states, 13998 states have (on average 1.6842406058008288) internal successors, (23576), 13998 states have internal predecessors, (23576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13999 states to 13999 states and 23576 transitions. [2021-08-21 18:53:14,184 INFO L78 Accepts]: Start accepts. Automaton has 13999 states and 23576 transitions. Word has length 32 [2021-08-21 18:53:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:14,184 INFO L470 AbstractCegarLoop]: Abstraction has 13999 states and 23576 transitions. [2021-08-21 18:53:14,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13999 states and 23576 transitions. [2021-08-21 18:53:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:14,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:14,202 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 18:53:14,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 18:53:14,202 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash 38493908, now seen corresponding path program 1 times [2021-08-21 18:53:14,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:14,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872198190] [2021-08-21 18:53:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:14,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:14,243 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 18:53:14,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:14,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872198190] [2021-08-21 18:53:14,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872198190] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:14,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:14,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:14,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679011004] [2021-08-21 18:53:14,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:14,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:14,244 INFO L87 Difference]: Start difference. First operand 13999 states and 23576 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,326 INFO L93 Difference]: Finished difference Result 15573 states and 26550 transitions. [2021-08-21 18:53:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,347 INFO L225 Difference]: With dead ends: 15573 [2021-08-21 18:53:14,347 INFO L226 Difference]: Without dead ends: 15560 [2021-08-21 18:53:14,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2021-08-21 18:53:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 14028. [2021-08-21 18:53:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 14027 states have (on average 1.68753118984815) internal successors, (23671), 14027 states have internal predecessors, (23671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 23671 transitions. [2021-08-21 18:53:14,508 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 23671 transitions. Word has length 32 [2021-08-21 18:53:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:14,508 INFO L470 AbstractCegarLoop]: Abstraction has 14028 states and 23671 transitions. [2021-08-21 18:53:14,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 23671 transitions. [2021-08-21 18:53:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:14,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:14,530 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, 1, 1, 1] [2021-08-21 18:53:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 18:53:14,530 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1495641556, now seen corresponding path program 1 times [2021-08-21 18:53:14,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:14,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305238550] [2021-08-21 18:53:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:14,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:14,566 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 18:53:14,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:14,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305238550] [2021-08-21 18:53:14,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305238550] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:14,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:14,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:14,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546876992] [2021-08-21 18:53:14,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:14,567 INFO L87 Difference]: Start difference. First operand 14028 states and 23671 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,656 INFO L93 Difference]: Finished difference Result 15693 states and 27173 transitions. [2021-08-21 18:53:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,677 INFO L225 Difference]: With dead ends: 15693 [2021-08-21 18:53:14,677 INFO L226 Difference]: Without dead ends: 15684 [2021-08-21 18:53:14,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2021-08-21 18:53:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 14078. [2021-08-21 18:53:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14078 states, 14077 states have (on average 1.697094551395894) internal successors, (23890), 14077 states have internal predecessors, (23890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14078 states to 14078 states and 23890 transitions. [2021-08-21 18:53:14,841 INFO L78 Accepts]: Start accepts. Automaton has 14078 states and 23890 transitions. Word has length 32 [2021-08-21 18:53:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:14,841 INFO L470 AbstractCegarLoop]: Abstraction has 14078 states and 23890 transitions. [2021-08-21 18:53:14,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14078 states and 23890 transitions. [2021-08-21 18:53:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:14,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:14,858 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:14,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-21 18:53:14,859 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -760690176, now seen corresponding path program 2 times [2021-08-21 18:53:14,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:14,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487626498] [2021-08-21 18:53:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:14,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:14,892 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 18:53:14,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:14,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487626498] [2021-08-21 18:53:14,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487626498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61067563] [2021-08-21 18:53:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:14,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:14,897 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 18:53:14,939 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 18:53:15,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:15,266 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 18:53:15,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61067563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:15,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:15,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:15,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939343386] [2021-08-21 18:53:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:15,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:15,267 INFO L87 Difference]: Start difference. First operand 14078 states and 23890 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:15,359 INFO L93 Difference]: Finished difference Result 15536 states and 26945 transitions. [2021-08-21 18:53:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:15,383 INFO L225 Difference]: With dead ends: 15536 [2021-08-21 18:53:15,383 INFO L226 Difference]: Without dead ends: 15527 [2021-08-21 18:53:15,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15527 states. [2021-08-21 18:53:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15527 to 14113. [2021-08-21 18:53:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14113 states, 14112 states have (on average 1.7045068027210883) internal successors, (24054), 14112 states have internal predecessors, (24054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14113 states to 14113 states and 24054 transitions. [2021-08-21 18:53:15,555 INFO L78 Accepts]: Start accepts. Automaton has 14113 states and 24054 transitions. Word has length 32 [2021-08-21 18:53:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:15,555 INFO L470 AbstractCegarLoop]: Abstraction has 14113 states and 24054 transitions. [2021-08-21 18:53:15,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 14113 states and 24054 transitions. [2021-08-21 18:53:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:15,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:15,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:15,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 18:53:15,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:15,774 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1487964656, now seen corresponding path program 2 times [2021-08-21 18:53:15,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:15,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583316157] [2021-08-21 18:53:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:15,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:15,827 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 18:53:15,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:15,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583316157] [2021-08-21 18:53:15,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583316157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:15,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905021011] [2021-08-21 18:53:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:15,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:15,829 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 18:53:15,834 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 18:53:16,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:16,210 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 18:53:16,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905021011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:16,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:16,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:16,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090731474] [2021-08-21 18:53:16,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:16,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:16,211 INFO L87 Difference]: Start difference. First operand 14113 states and 24054 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:16,303 INFO L93 Difference]: Finished difference Result 15432 states and 26819 transitions. [2021-08-21 18:53:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:16,323 INFO L225 Difference]: With dead ends: 15432 [2021-08-21 18:53:16,324 INFO L226 Difference]: Without dead ends: 15423 [2021-08-21 18:53:16,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15423 states. [2021-08-21 18:53:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15423 to 14133. [2021-08-21 18:53:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14133 states, 14132 states have (on average 1.7088876309085763) internal successors, (24150), 14132 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14133 states to 14133 states and 24150 transitions. [2021-08-21 18:53:16,497 INFO L78 Accepts]: Start accepts. Automaton has 14133 states and 24150 transitions. Word has length 32 [2021-08-21 18:53:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 14133 states and 24150 transitions. [2021-08-21 18:53:16,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14133 states and 24150 transitions. [2021-08-21 18:53:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:16,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:16,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:16,534 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 18:53:16,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:16,716 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1556422540, now seen corresponding path program 2 times [2021-08-21 18:53:16,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:16,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144728489] [2021-08-21 18:53:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:16,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:16,761 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 18:53:16,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:16,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144728489] [2021-08-21 18:53:16,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144728489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:16,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811355759] [2021-08-21 18:53:16,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:16,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:16,762 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 18:53:16,772 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 18:53:16,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:16,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:17,149 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 18:53:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811355759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:17,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:17,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841257280] [2021-08-21 18:53:17,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:17,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:17,150 INFO L87 Difference]: Start difference. First operand 14133 states and 24150 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:17,241 INFO L93 Difference]: Finished difference Result 15547 states and 27104 transitions. [2021-08-21 18:53:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:17,265 INFO L225 Difference]: With dead ends: 15547 [2021-08-21 18:53:17,265 INFO L226 Difference]: Without dead ends: 15538 [2021-08-21 18:53:17,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15538 states. [2021-08-21 18:53:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15538 to 14158. [2021-08-21 18:53:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14158 states, 14157 states have (on average 1.714063714063714) internal successors, (24266), 14157 states have internal predecessors, (24266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14158 states to 14158 states and 24266 transitions. [2021-08-21 18:53:17,445 INFO L78 Accepts]: Start accepts. Automaton has 14158 states and 24266 transitions. Word has length 32 [2021-08-21 18:53:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:17,445 INFO L470 AbstractCegarLoop]: Abstraction has 14158 states and 24266 transitions. [2021-08-21 18:53:17,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14158 states and 24266 transitions. [2021-08-21 18:53:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:17,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:17,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:17,482 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 18:53:17,667 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,SelfDestructingSolverStorable34 [2021-08-21 18:53:17,667 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash -162471820, now seen corresponding path program 1 times [2021-08-21 18:53:17,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:17,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436536545] [2021-08-21 18:53:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:17,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:17,704 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 18:53:17,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:17,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436536545] [2021-08-21 18:53:17,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436536545] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:17,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:17,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:17,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347464857] [2021-08-21 18:53:17,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:17,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:17,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:17,705 INFO L87 Difference]: Start difference. First operand 14158 states and 24266 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:17,783 INFO L93 Difference]: Finished difference Result 15813 states and 27651 transitions. [2021-08-21 18:53:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:17,804 INFO L225 Difference]: With dead ends: 15813 [2021-08-21 18:53:17,804 INFO L226 Difference]: Without dead ends: 15804 [2021-08-21 18:53:17,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15804 states. [2021-08-21 18:53:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15804 to 14216. [2021-08-21 18:53:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14216 states, 14215 states have (on average 1.7224059092507915) internal successors, (24484), 14215 states have internal predecessors, (24484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 24484 transitions. [2021-08-21 18:53:17,966 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 24484 transitions. Word has length 32 [2021-08-21 18:53:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:17,966 INFO L470 AbstractCegarLoop]: Abstraction has 14216 states and 24484 transitions. [2021-08-21 18:53:17,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 24484 transitions. [2021-08-21 18:53:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:17,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:17,984 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 18:53:17,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-21 18:53:17,985 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash 203916276, now seen corresponding path program 1 times [2021-08-21 18:53:17,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:17,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78667530] [2021-08-21 18:53:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:17,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:18,022 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 18:53:18,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:18,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78667530] [2021-08-21 18:53:18,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78667530] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:18,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:18,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:18,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501221855] [2021-08-21 18:53:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:18,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,024 INFO L87 Difference]: Start difference. First operand 14216 states and 24484 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:18,101 INFO L93 Difference]: Finished difference Result 15757 states and 27514 transitions. [2021-08-21 18:53:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:18,124 INFO L225 Difference]: With dead ends: 15757 [2021-08-21 18:53:18,124 INFO L226 Difference]: Without dead ends: 15748 [2021-08-21 18:53:18,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15748 states. [2021-08-21 18:53:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15748 to 14268. [2021-08-21 18:53:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14268 states, 14267 states have (on average 1.7274129109132965) internal successors, (24645), 14267 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 24645 transitions. [2021-08-21 18:53:18,302 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 24645 transitions. Word has length 32 [2021-08-21 18:53:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:18,303 INFO L470 AbstractCegarLoop]: Abstraction has 14268 states and 24645 transitions. [2021-08-21 18:53:18,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 24645 transitions. [2021-08-21 18:53:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:18,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:18,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:18,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-21 18:53:18,324 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1848838728, now seen corresponding path program 1 times [2021-08-21 18:53:18,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:18,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273691247] [2021-08-21 18:53:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:18,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:18,367 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 18:53:18,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:18,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273691247] [2021-08-21 18:53:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273691247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:18,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:18,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:18,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455642188] [2021-08-21 18:53:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:18,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:18,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,369 INFO L87 Difference]: Start difference. First operand 14268 states and 24645 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:18,449 INFO L93 Difference]: Finished difference Result 15896 states and 27663 transitions. [2021-08-21 18:53:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:18,475 INFO L225 Difference]: With dead ends: 15896 [2021-08-21 18:53:18,475 INFO L226 Difference]: Without dead ends: 15883 [2021-08-21 18:53:18,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-08-21 18:53:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14321. [2021-08-21 18:53:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 14320 states have (on average 1.7297486033519553) internal successors, (24770), 14320 states have internal predecessors, (24770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 24770 transitions. [2021-08-21 18:53:18,648 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 24770 transitions. Word has length 32 [2021-08-21 18:53:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:18,648 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 24770 transitions. [2021-08-21 18:53:18,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 24770 transitions. [2021-08-21 18:53:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:18,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:18,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:18,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 18:53:18,666 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:18,666 INFO L82 PathProgramCache]: Analyzing trace with hash -988980920, now seen corresponding path program 1 times [2021-08-21 18:53:18,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:18,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272086179] [2021-08-21 18:53:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:18,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:18,703 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 18:53:18,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:18,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272086179] [2021-08-21 18:53:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272086179] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:18,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:18,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615579193] [2021-08-21 18:53:18,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:18,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,704 INFO L87 Difference]: Start difference. First operand 14321 states and 24770 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:18,791 INFO L93 Difference]: Finished difference Result 16040 states and 28288 transitions. [2021-08-21 18:53:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:18,817 INFO L225 Difference]: With dead ends: 16040 [2021-08-21 18:53:18,817 INFO L226 Difference]: Without dead ends: 16031 [2021-08-21 18:53:18,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2021-08-21 18:53:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 14372. [2021-08-21 18:53:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 14371 states have (on average 1.7364136107438592) internal successors, (24954), 14371 states have internal predecessors, (24954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 24954 transitions. [2021-08-21 18:53:19,014 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 24954 transitions. Word has length 32 [2021-08-21 18:53:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:19,014 INFO L470 AbstractCegarLoop]: Abstraction has 14372 states and 24954 transitions. [2021-08-21 18:53:19,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 24954 transitions. [2021-08-21 18:53:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:19,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:19,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-21 18:53:19,032 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -305842440, now seen corresponding path program 2 times [2021-08-21 18:53:19,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:19,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632433980] [2021-08-21 18:53:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:19,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:19,068 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 18:53:19,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:19,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632433980] [2021-08-21 18:53:19,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632433980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:19,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131787461] [2021-08-21 18:53:19,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:19,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:19,073 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 18:53:19,096 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 18:53:19,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:19,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:19,488 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 18:53:19,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131787461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:19,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:19,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:19,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47385740] [2021-08-21 18:53:19,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:19,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:19,489 INFO L87 Difference]: Start difference. First operand 14372 states and 24954 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:19,579 INFO L93 Difference]: Finished difference Result 15868 states and 28068 transitions. [2021-08-21 18:53:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:19,603 INFO L225 Difference]: With dead ends: 15868 [2021-08-21 18:53:19,603 INFO L226 Difference]: Without dead ends: 15859 [2021-08-21 18:53:19,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15859 states. [2021-08-21 18:53:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15859 to 14402. [2021-08-21 18:53:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 1.741892924102493) internal successors, (25085), 14401 states have internal predecessors, (25085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 25085 transitions. [2021-08-21 18:53:19,833 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 25085 transitions. Word has length 32 [2021-08-21 18:53:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:19,833 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 25085 transitions. [2021-08-21 18:53:19,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 25085 transitions. [2021-08-21 18:53:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:19,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:19,850 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 18:53:19,871 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 18:53:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:53:20,051 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1394186496, now seen corresponding path program 1 times [2021-08-21 18:53:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240890596] [2021-08-21 18:53:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,092 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 18:53:20,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240890596] [2021-08-21 18:53:20,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240890596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:20,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:20,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:20,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574592929] [2021-08-21 18:53:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:20,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,093 INFO L87 Difference]: Start difference. First operand 14402 states and 25085 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,168 INFO L93 Difference]: Finished difference Result 15942 states and 28172 transitions. [2021-08-21 18:53:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,189 INFO L225 Difference]: With dead ends: 15942 [2021-08-21 18:53:20,189 INFO L226 Difference]: Without dead ends: 15933 [2021-08-21 18:53:20,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15933 states. [2021-08-21 18:53:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15933 to 14452. [2021-08-21 18:53:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14452 states, 14451 states have (on average 1.7480451179849146) internal successors, (25261), 14451 states have internal predecessors, (25261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14452 states to 14452 states and 25261 transitions. [2021-08-21 18:53:20,353 INFO L78 Accepts]: Start accepts. Automaton has 14452 states and 25261 transitions. Word has length 32 [2021-08-21 18:53:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:20,353 INFO L470 AbstractCegarLoop]: Abstraction has 14452 states and 25261 transitions. [2021-08-21 18:53:20,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14452 states and 25261 transitions. [2021-08-21 18:53:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:20,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:20,371 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 18:53:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-21 18:53:20,371 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1255858348, now seen corresponding path program 1 times [2021-08-21 18:53:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226203569] [2021-08-21 18:53:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,432 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 18:53:20,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226203569] [2021-08-21 18:53:20,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226203569] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:20,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:20,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:20,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677074104] [2021-08-21 18:53:20,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:20,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,433 INFO L87 Difference]: Start difference. First operand 14452 states and 25261 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,514 INFO L93 Difference]: Finished difference Result 16080 states and 28329 transitions. [2021-08-21 18:53:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,538 INFO L225 Difference]: With dead ends: 16080 [2021-08-21 18:53:20,538 INFO L226 Difference]: Without dead ends: 16067 [2021-08-21 18:53:20,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16067 states. [2021-08-21 18:53:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16067 to 14499. [2021-08-21 18:53:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14499 states, 14498 states have (on average 1.7509311629190234) internal successors, (25385), 14498 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14499 states to 14499 states and 25385 transitions. [2021-08-21 18:53:20,711 INFO L78 Accepts]: Start accepts. Automaton has 14499 states and 25385 transitions. Word has length 32 [2021-08-21 18:53:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:20,711 INFO L470 AbstractCegarLoop]: Abstraction has 14499 states and 25385 transitions. [2021-08-21 18:53:20,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 14499 states and 25385 transitions. [2021-08-21 18:53:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:20,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:20,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:20,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-21 18:53:20,730 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash 201289300, now seen corresponding path program 1 times [2021-08-21 18:53:20,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972989843] [2021-08-21 18:53:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,762 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 18:53:20,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972989843] [2021-08-21 18:53:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972989843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58241492] [2021-08-21 18:53:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:20,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,763 INFO L87 Difference]: Start difference. First operand 14499 states and 25385 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,853 INFO L93 Difference]: Finished difference Result 16207 states and 28938 transitions. [2021-08-21 18:53:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,882 INFO L225 Difference]: With dead ends: 16207 [2021-08-21 18:53:20,882 INFO L226 Difference]: Without dead ends: 16198 [2021-08-21 18:53:20,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16198 states. [2021-08-21 18:53:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16198 to 14545. [2021-08-21 18:53:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14545 states, 14544 states have (on average 1.759419691969197) internal successors, (25589), 14544 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 18:53:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14545 states to 14545 states and 25589 transitions. [2021-08-21 18:53:21,055 INFO L78 Accepts]: Start accepts. Automaton has 14545 states and 25589 transitions. Word has length 32 [2021-08-21 18:53:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:21,056 INFO L470 AbstractCegarLoop]: Abstraction has 14545 states and 25589 transitions. [2021-08-21 18:53:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 14545 states and 25589 transitions. [2021-08-21 18:53:21,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:21,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:21,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:21,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-21 18:53:21,074 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1141188096, now seen corresponding path program 2 times [2021-08-21 18:53:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:21,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427309040] [2021-08-21 18:53:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:21,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:21,111 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 18:53:21,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:21,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427309040] [2021-08-21 18:53:21,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427309040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:21,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185391954] [2021-08-21 18:53:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:21,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:21,125 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 18:53:21,126 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 18:53:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:21,540 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 18:53:21,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185391954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:21,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:21,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:21,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796049805] [2021-08-21 18:53:21,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:21,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:21,542 INFO L87 Difference]: Start difference. First operand 14545 states and 25589 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:21,622 INFO L93 Difference]: Finished difference Result 16034 states and 28630 transitions. [2021-08-21 18:53:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:21,647 INFO L225 Difference]: With dead ends: 16034 [2021-08-21 18:53:21,647 INFO L226 Difference]: Without dead ends: 16025 [2021-08-21 18:53:21,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16025 states. [2021-08-21 18:53:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16025 to 14580. [2021-08-21 18:53:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 1.7645243157966939) internal successors, (25725), 14579 states have internal predecessors, (25725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 25725 transitions. [2021-08-21 18:53:21,820 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 25725 transitions. Word has length 32 [2021-08-21 18:53:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:21,820 INFO L470 AbstractCegarLoop]: Abstraction has 14580 states and 25725 transitions. [2021-08-21 18:53:21,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 25725 transitions. [2021-08-21 18:53:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:21,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:21,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:21,859 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 18:53:22,039 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,SelfDestructingSolverStorable43 [2021-08-21 18:53:22,040 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1014001532, now seen corresponding path program 2 times [2021-08-21 18:53:22,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:22,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027476823] [2021-08-21 18:53:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:22,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:22,073 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 18:53:22,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:22,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027476823] [2021-08-21 18:53:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027476823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763220117] [2021-08-21 18:53:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:22,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:22,077 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 18:53:22,080 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 18:53:22,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:22,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:22,527 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 18:53:22,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763220117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:22,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:22,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084430522] [2021-08-21 18:53:22,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:22,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:22,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:22,528 INFO L87 Difference]: Start difference. First operand 14580 states and 25725 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:22,613 INFO L93 Difference]: Finished difference Result 15990 states and 28573 transitions. [2021-08-21 18:53:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:22,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:22,636 INFO L225 Difference]: With dead ends: 15990 [2021-08-21 18:53:22,636 INFO L226 Difference]: Without dead ends: 15981 [2021-08-21 18:53:22,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15981 states. [2021-08-21 18:53:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15981 to 14605. [2021-08-21 18:53:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14605 states, 14604 states have (on average 1.768008764721994) internal successors, (25820), 14604 states have internal predecessors, (25820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14605 states to 14605 states and 25820 transitions. [2021-08-21 18:53:22,816 INFO L78 Accepts]: Start accepts. Automaton has 14605 states and 25820 transitions. Word has length 32 [2021-08-21 18:53:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:22,816 INFO L470 AbstractCegarLoop]: Abstraction has 14605 states and 25820 transitions. [2021-08-21 18:53:22,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 14605 states and 25820 transitions. [2021-08-21 18:53:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:22,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:22,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:22,851 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 18:53:23,038 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,SelfDestructingSolverStorable44 [2021-08-21 18:53:23,038 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash -886814968, now seen corresponding path program 2 times [2021-08-21 18:53:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:23,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943092005] [2021-08-21 18:53:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:23,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:23,072 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 18:53:23,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:23,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943092005] [2021-08-21 18:53:23,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943092005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:23,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091847519] [2021-08-21 18:53:23,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:23,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:23,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:23,073 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 18:53:23,074 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 18:53:23,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:23,528 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 18:53:23,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091847519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:23,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:23,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:23,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639135136] [2021-08-21 18:53:23,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:23,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:23,529 INFO L87 Difference]: Start difference. First operand 14605 states and 25820 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:23,621 INFO L93 Difference]: Finished difference Result 16072 states and 28716 transitions. [2021-08-21 18:53:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:23,646 INFO L225 Difference]: With dead ends: 16072 [2021-08-21 18:53:23,646 INFO L226 Difference]: Without dead ends: 16063 [2021-08-21 18:53:23,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-08-21 18:53:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14635. [2021-08-21 18:53:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14635 states, 14634 states have (on average 1.7712860461937954) internal successors, (25921), 14634 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14635 states to 14635 states and 25921 transitions. [2021-08-21 18:53:23,831 INFO L78 Accepts]: Start accepts. Automaton has 14635 states and 25921 transitions. Word has length 32 [2021-08-21 18:53:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:23,831 INFO L470 AbstractCegarLoop]: Abstraction has 14635 states and 25921 transitions. [2021-08-21 18:53:23,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 14635 states and 25921 transitions. [2021-08-21 18:53:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:23,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:23,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:23,866 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 18:53:24,049 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,SelfDestructingSolverStorable45 [2021-08-21 18:53:24,050 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1607648140, now seen corresponding path program 2 times [2021-08-21 18:53:24,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:24,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063698287] [2021-08-21 18:53:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:24,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:24,090 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 18:53:24,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:24,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063698287] [2021-08-21 18:53:24,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063698287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:24,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950548402] [2021-08-21 18:53:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:24,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:24,091 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 18:53:24,092 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 18:53:24,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:24,589 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 18:53:24,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950548402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:24,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:24,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:24,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310951659] [2021-08-21 18:53:24,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:24,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:24,590 INFO L87 Difference]: Start difference. First operand 14635 states and 25921 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:24,687 INFO L93 Difference]: Finished difference Result 15991 states and 28781 transitions. [2021-08-21 18:53:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:24,710 INFO L225 Difference]: With dead ends: 15991 [2021-08-21 18:53:24,710 INFO L226 Difference]: Without dead ends: 15982 [2021-08-21 18:53:24,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15982 states. [2021-08-21 18:53:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15982 to 14650. [2021-08-21 18:53:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14650 states, 14649 states have (on average 1.7752064987371152) internal successors, (26005), 14649 states have internal predecessors, (26005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14650 states to 14650 states and 26005 transitions. [2021-08-21 18:53:24,882 INFO L78 Accepts]: Start accepts. Automaton has 14650 states and 26005 transitions. Word has length 32 [2021-08-21 18:53:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:24,882 INFO L470 AbstractCegarLoop]: Abstraction has 14650 states and 26005 transitions. [2021-08-21 18:53:24,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14650 states and 26005 transitions. [2021-08-21 18:53:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:24,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:24,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:24,918 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 18:53:25,100 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,SelfDestructingSolverStorable46 [2021-08-21 18:53:25,100 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1862021268, now seen corresponding path program 2 times [2021-08-21 18:53:25,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:25,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744021968] [2021-08-21 18:53:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:25,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:25,138 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 18:53:25,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:25,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744021968] [2021-08-21 18:53:25,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744021968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769463012] [2021-08-21 18:53:25,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:25,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:25,141 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 18:53:25,154 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 18:53:25,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:25,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:25,632 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 18:53:25,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769463012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:25,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:25,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231835390] [2021-08-21 18:53:25,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:25,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:25,633 INFO L87 Difference]: Start difference. First operand 14650 states and 26005 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:25,721 INFO L93 Difference]: Finished difference Result 15923 states and 28622 transitions. [2021-08-21 18:53:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:25,744 INFO L225 Difference]: With dead ends: 15923 [2021-08-21 18:53:25,744 INFO L226 Difference]: Without dead ends: 15914 [2021-08-21 18:53:25,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15914 states. [2021-08-21 18:53:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15914 to 14655. [2021-08-21 18:53:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14655 states, 14654 states have (on average 1.7765797734406987) internal successors, (26034), 14654 states have internal predecessors, (26034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14655 states to 14655 states and 26034 transitions. [2021-08-21 18:53:25,919 INFO L78 Accepts]: Start accepts. Automaton has 14655 states and 26034 transitions. Word has length 32 [2021-08-21 18:53:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:25,920 INFO L470 AbstractCegarLoop]: Abstraction has 14655 states and 26034 transitions. [2021-08-21 18:53:25,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14655 states and 26034 transitions. [2021-08-21 18:53:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:25,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:25,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:25,954 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 18:53:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:26,139 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1989207832, now seen corresponding path program 2 times [2021-08-21 18:53:26,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:26,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680712261] [2021-08-21 18:53:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:26,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:26,175 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 18:53:26,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:26,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680712261] [2021-08-21 18:53:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680712261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:26,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317536389] [2021-08-21 18:53:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:26,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:26,177 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 18:53:26,177 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 18:53:26,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:26,697 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 18:53:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317536389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:26,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:26,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:26,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164794872] [2021-08-21 18:53:26,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:26,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:26,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:26,698 INFO L87 Difference]: Start difference. First operand 14655 states and 26034 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:26,780 INFO L93 Difference]: Finished difference Result 15981 states and 28737 transitions. [2021-08-21 18:53:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:26,801 INFO L225 Difference]: With dead ends: 15981 [2021-08-21 18:53:26,801 INFO L226 Difference]: Without dead ends: 15972 [2021-08-21 18:53:26,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15972 states. [2021-08-21 18:53:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15972 to 14665. [2021-08-21 18:53:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14665 states, 14664 states have (on average 1.7788461538461537) internal successors, (26085), 14664 states have internal predecessors, (26085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14665 states to 14665 states and 26085 transitions. [2021-08-21 18:53:26,971 INFO L78 Accepts]: Start accepts. Automaton has 14665 states and 26085 transitions. Word has length 32 [2021-08-21 18:53:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:26,971 INFO L470 AbstractCegarLoop]: Abstraction has 14665 states and 26085 transitions. [2021-08-21 18:53:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 14665 states and 26085 transitions. [2021-08-21 18:53:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:26,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:26,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:27,008 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 18:53:27,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:53:27,190 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -725928320, now seen corresponding path program 2 times [2021-08-21 18:53:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:27,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219957592] [2021-08-21 18:53:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:27,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:27,230 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 18:53:27,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219957592] [2021-08-21 18:53:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219957592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449270593] [2021-08-21 18:53:27,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:27,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:27,231 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 18:53:27,232 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 18:53:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:27,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:27,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:27,776 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 18:53:27,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449270593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:27,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:27,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:27,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620496993] [2021-08-21 18:53:27,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:27,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:27,777 INFO L87 Difference]: Start difference. First operand 14665 states and 26085 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:27,856 INFO L93 Difference]: Finished difference Result 16099 states and 28921 transitions. [2021-08-21 18:53:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:27,877 INFO L225 Difference]: With dead ends: 16099 [2021-08-21 18:53:27,877 INFO L226 Difference]: Without dead ends: 16090 [2021-08-21 18:53:27,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16090 states. [2021-08-21 18:53:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16090 to 14695. [2021-08-21 18:53:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14695 states, 14694 states have (on average 1.7819518170681912) internal successors, (26184), 14694 states have internal predecessors, (26184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14695 states to 14695 states and 26184 transitions. [2021-08-21 18:53:28,046 INFO L78 Accepts]: Start accepts. Automaton has 14695 states and 26184 transitions. Word has length 32 [2021-08-21 18:53:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:28,047 INFO L470 AbstractCegarLoop]: Abstraction has 14695 states and 26184 transitions. [2021-08-21 18:53:28,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 14695 states and 26184 transitions. [2021-08-21 18:53:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:28,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:28,065 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 18:53:28,081 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 18:53:28,265 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,SelfDestructingSolverStorable49 [2021-08-21 18:53:28,266 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:28,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1137467524, now seen corresponding path program 2 times [2021-08-21 18:53:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:28,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455559733] [2021-08-21 18:53:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:28,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:28,304 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 18:53:28,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:28,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455559733] [2021-08-21 18:53:28,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455559733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:28,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104897843] [2021-08-21 18:53:28,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:28,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:28,306 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 18:53:28,306 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 18:53:28,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:28,863 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 18:53:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104897843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:28,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668310493] [2021-08-21 18:53:28,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:28,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:28,864 INFO L87 Difference]: Start difference. First operand 14695 states and 26184 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:28,968 INFO L93 Difference]: Finished difference Result 16187 states and 29060 transitions. [2021-08-21 18:53:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:28,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:28,990 INFO L225 Difference]: With dead ends: 16187 [2021-08-21 18:53:28,990 INFO L226 Difference]: Without dead ends: 16178 [2021-08-21 18:53:28,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16178 states. [2021-08-21 18:53:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16178 to 14730. [2021-08-21 18:53:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 1.7845746486523186) internal successors, (26285), 14729 states have internal predecessors, (26285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 26285 transitions. [2021-08-21 18:53:29,156 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 26285 transitions. Word has length 32 [2021-08-21 18:53:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:29,156 INFO L470 AbstractCegarLoop]: Abstraction has 14730 states and 26285 transitions. [2021-08-21 18:53:29,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 26285 transitions. [2021-08-21 18:53:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:29,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:29,174 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 18:53:29,191 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 18:53:29,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:29,381 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash -918453640, now seen corresponding path program 2 times [2021-08-21 18:53:29,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:29,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599545443] [2021-08-21 18:53:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:29,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:29,414 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 18:53:29,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599545443] [2021-08-21 18:53:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599545443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929566865] [2021-08-21 18:53:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:29,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:29,415 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 18:53:29,436 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 18:53:29,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:29,977 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 18:53:29,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929566865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:29,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:29,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086606697] [2021-08-21 18:53:29,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:29,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:29,978 INFO L87 Difference]: Start difference. First operand 14730 states and 26285 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:30,089 INFO L93 Difference]: Finished difference Result 16182 states and 29342 transitions. [2021-08-21 18:53:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:30,118 INFO L225 Difference]: With dead ends: 16182 [2021-08-21 18:53:30,118 INFO L226 Difference]: Without dead ends: 16173 [2021-08-21 18:53:30,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16173 states. [2021-08-21 18:53:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16173 to 14750. [2021-08-21 18:53:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14750 states, 14749 states have (on average 1.789477252695098) internal successors, (26393), 14749 states have internal predecessors, (26393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14750 states to 14750 states and 26393 transitions. [2021-08-21 18:53:30,309 INFO L78 Accepts]: Start accepts. Automaton has 14750 states and 26393 transitions. Word has length 32 [2021-08-21 18:53:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:30,310 INFO L470 AbstractCegarLoop]: Abstraction has 14750 states and 26393 transitions. [2021-08-21 18:53:30,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 14750 states and 26393 transitions. [2021-08-21 18:53:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:30,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:30,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:30,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:30,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:30,529 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1741532048, now seen corresponding path program 2 times [2021-08-21 18:53:30,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:30,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28917086] [2021-08-21 18:53:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:30,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:30,572 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 18:53:30,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:30,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28917086] [2021-08-21 18:53:30,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28917086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:30,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776146158] [2021-08-21 18:53:30,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:30,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:30,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:30,573 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 18:53:30,574 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 18:53:31,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:31,172 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 18:53:31,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776146158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:31,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:31,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291268362] [2021-08-21 18:53:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:31,173 INFO L87 Difference]: Start difference. First operand 14750 states and 26393 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:31,259 INFO L93 Difference]: Finished difference Result 16120 states and 29201 transitions. [2021-08-21 18:53:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:31,283 INFO L225 Difference]: With dead ends: 16120 [2021-08-21 18:53:31,283 INFO L226 Difference]: Without dead ends: 16111 [2021-08-21 18:53:31,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16111 states. [2021-08-21 18:53:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16111 to 14760. [2021-08-21 18:53:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14760 states, 14759 states have (on average 1.7918558167897554) internal successors, (26446), 14759 states have internal predecessors, (26446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14760 states to 14760 states and 26446 transitions. [2021-08-21 18:53:31,471 INFO L78 Accepts]: Start accepts. Automaton has 14760 states and 26446 transitions. Word has length 32 [2021-08-21 18:53:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:31,471 INFO L470 AbstractCegarLoop]: Abstraction has 14760 states and 26446 transitions. [2021-08-21 18:53:31,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 14760 states and 26446 transitions. [2021-08-21 18:53:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:31,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:31,492 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 18:53:31,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:31,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,692 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2141896044, now seen corresponding path program 2 times [2021-08-21 18:53:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:31,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455772555] [2021-08-21 18:53:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:31,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:31,726 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 18:53:31,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:31,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455772555] [2021-08-21 18:53:31,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455772555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481268468] [2021-08-21 18:53:31,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:31,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:31,728 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 18:53:31,744 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 18:53:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:32,361 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 18:53:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481268468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:32,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:32,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:32,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471430274] [2021-08-21 18:53:32,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:32,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:32,362 INFO L87 Difference]: Start difference. First operand 14760 states and 26446 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:32,457 INFO L93 Difference]: Finished difference Result 16184 states and 29325 transitions. [2021-08-21 18:53:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:32,482 INFO L225 Difference]: With dead ends: 16184 [2021-08-21 18:53:32,482 INFO L226 Difference]: Without dead ends: 16175 [2021-08-21 18:53:32,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16175 states. [2021-08-21 18:53:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16175 to 14775. [2021-08-21 18:53:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14775 states, 14774 states have (on average 1.794842290510356) internal successors, (26517), 14774 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14775 states to 14775 states and 26517 transitions. [2021-08-21 18:53:32,666 INFO L78 Accepts]: Start accepts. Automaton has 14775 states and 26517 transitions. Word has length 32 [2021-08-21 18:53:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 14775 states and 26517 transitions. [2021-08-21 18:53:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 14775 states and 26517 transitions. [2021-08-21 18:53:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:32,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:32,684 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 18:53:32,704 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 18:53:32,896 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,SelfDestructingSolverStorable53 [2021-08-21 18:53:32,897 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 300010452, now seen corresponding path program 1 times [2021-08-21 18:53:32,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:32,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606032428] [2021-08-21 18:53:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:32,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:32,931 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 18:53:32,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606032428] [2021-08-21 18:53:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606032428] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:32,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:32,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:32,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308948223] [2021-08-21 18:53:32,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:32,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:32,932 INFO L87 Difference]: Start difference. First operand 14775 states and 26517 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:33,008 INFO L93 Difference]: Finished difference Result 16306 states and 29306 transitions. [2021-08-21 18:53:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:33,033 INFO L225 Difference]: With dead ends: 16306 [2021-08-21 18:53:33,034 INFO L226 Difference]: Without dead ends: 16293 [2021-08-21 18:53:33,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2021-08-21 18:53:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 14831. [2021-08-21 18:53:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14831 states, 14830 states have (on average 1.7958192852326365) internal successors, (26632), 14830 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14831 states to 14831 states and 26632 transitions. [2021-08-21 18:53:33,219 INFO L78 Accepts]: Start accepts. Automaton has 14831 states and 26632 transitions. Word has length 32 [2021-08-21 18:53:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 14831 states and 26632 transitions. [2021-08-21 18:53:33,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14831 states and 26632 transitions. [2021-08-21 18:53:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:33,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:33,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-21 18:53:33,238 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1757158100, now seen corresponding path program 1 times [2021-08-21 18:53:33,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:33,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992486908] [2021-08-21 18:53:33,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:33,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:33,274 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 18:53:33,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:33,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992486908] [2021-08-21 18:53:33,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992486908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:33,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:33,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:33,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926071335] [2021-08-21 18:53:33,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:33,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:33,275 INFO L87 Difference]: Start difference. First operand 14831 states and 26632 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:33,355 INFO L93 Difference]: Finished difference Result 16429 states and 29829 transitions. [2021-08-21 18:53:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:33,377 INFO L225 Difference]: With dead ends: 16429 [2021-08-21 18:53:33,377 INFO L226 Difference]: Without dead ends: 16420 [2021-08-21 18:53:33,378 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 18:53:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16420 states. [2021-08-21 18:53:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16420 to 14860. [2021-08-21 18:53:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14860 states, 14859 states have (on average 1.7994481459048388) internal successors, (26738), 14859 states have internal predecessors, (26738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14860 states to 14860 states and 26738 transitions. [2021-08-21 18:53:33,549 INFO L78 Accepts]: Start accepts. Automaton has 14860 states and 26738 transitions. Word has length 32 [2021-08-21 18:53:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:33,549 INFO L470 AbstractCegarLoop]: Abstraction has 14860 states and 26738 transitions. [2021-08-21 18:53:33,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 14860 states and 26738 transitions. [2021-08-21 18:53:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:33,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:33,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:33,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-21 18:53:33,567 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1405269504, now seen corresponding path program 2 times [2021-08-21 18:53:33,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:33,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725253637] [2021-08-21 18:53:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:33,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:33,602 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 18:53:33,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:33,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725253637] [2021-08-21 18:53:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725253637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:33,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606318155] [2021-08-21 18:53:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:33,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:33,603 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 18:53:33,604 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 18:53:34,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:34,226 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 18:53:34,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606318155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:34,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:34,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:34,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911613399] [2021-08-21 18:53:34,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:34,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:34,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:34,227 INFO L87 Difference]: Start difference. First operand 14860 states and 26738 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:34,301 INFO L93 Difference]: Finished difference Result 16166 states and 29195 transitions. [2021-08-21 18:53:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:34,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:34,324 INFO L225 Difference]: With dead ends: 16166 [2021-08-21 18:53:34,324 INFO L226 Difference]: Without dead ends: 16157 [2021-08-21 18:53:34,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16157 states. [2021-08-21 18:53:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16157 to 14898. [2021-08-21 18:53:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14898 states, 14897 states have (on average 1.80089950996845) internal successors, (26828), 14897 states have internal predecessors, (26828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14898 states to 14898 states and 26828 transitions. [2021-08-21 18:53:34,495 INFO L78 Accepts]: Start accepts. Automaton has 14898 states and 26828 transitions. Word has length 32 [2021-08-21 18:53:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:34,495 INFO L470 AbstractCegarLoop]: Abstraction has 14898 states and 26828 transitions. [2021-08-21 18:53:34,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 14898 states and 26828 transitions. [2021-08-21 18:53:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:34,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:34,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:34,534 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 18:53:34,731 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,SelfDestructingSolverStorable56 [2021-08-21 18:53:34,732 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1398204540, now seen corresponding path program 2 times [2021-08-21 18:53:34,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:34,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995429631] [2021-08-21 18:53:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:34,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:34,765 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 18:53:34,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:34,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995429631] [2021-08-21 18:53:34,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995429631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:34,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110462848] [2021-08-21 18:53:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:34,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:34,766 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 18:53:34,778 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 18:53:35,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:35,437 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 18:53:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110462848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:35,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:35,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270384577] [2021-08-21 18:53:35,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:35,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:35,438 INFO L87 Difference]: Start difference. First operand 14898 states and 26828 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:35,542 INFO L93 Difference]: Finished difference Result 16405 states and 29977 transitions. [2021-08-21 18:53:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:35,565 INFO L225 Difference]: With dead ends: 16405 [2021-08-21 18:53:35,565 INFO L226 Difference]: Without dead ends: 16396 [2021-08-21 18:53:35,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16396 states. [2021-08-21 18:53:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16396 to 14923. [2021-08-21 18:53:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14923 states, 14922 states have (on average 1.8063932448733413) internal successors, (26955), 14922 states have internal predecessors, (26955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14923 states to 14923 states and 26955 transitions. [2021-08-21 18:53:35,739 INFO L78 Accepts]: Start accepts. Automaton has 14923 states and 26955 transitions. Word has length 32 [2021-08-21 18:53:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:35,739 INFO L470 AbstractCegarLoop]: Abstraction has 14923 states and 26955 transitions. [2021-08-21 18:53:35,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 14923 states and 26955 transitions. [2021-08-21 18:53:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:35,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:35,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:35,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:53:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,959 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1009113460, now seen corresponding path program 2 times [2021-08-21 18:53:35,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:35,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477498681] [2021-08-21 18:53:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:35,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:35,998 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 18:53:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477498681] [2021-08-21 18:53:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477498681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854068064] [2021-08-21 18:53:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:35,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:36,000 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 18:53:36,001 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 18:53:36,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:36,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:36,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:36,699 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 18:53:36,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854068064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:36,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:36,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:36,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102691991] [2021-08-21 18:53:36,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:36,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:36,700 INFO L87 Difference]: Start difference. First operand 14923 states and 26955 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:36,787 INFO L93 Difference]: Finished difference Result 16349 states and 29859 transitions. [2021-08-21 18:53:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:36,812 INFO L225 Difference]: With dead ends: 16349 [2021-08-21 18:53:36,812 INFO L226 Difference]: Without dead ends: 16340 [2021-08-21 18:53:36,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16340 states. [2021-08-21 18:53:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16340 to 14938. [2021-08-21 18:53:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14938 states, 14937 states have (on average 1.8093994778067886) internal successors, (27027), 14937 states have internal predecessors, (27027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14938 states to 14938 states and 27027 transitions. [2021-08-21 18:53:37,012 INFO L78 Accepts]: Start accepts. Automaton has 14938 states and 27027 transitions. Word has length 32 [2021-08-21 18:53:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:37,012 INFO L470 AbstractCegarLoop]: Abstraction has 14938 states and 27027 transitions. [2021-08-21 18:53:37,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 14938 states and 27027 transitions. [2021-08-21 18:53:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:37,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:37,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:37,065 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 18:53:37,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:37,234 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:37,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1332915728, now seen corresponding path program 2 times [2021-08-21 18:53:37,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:37,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226927507] [2021-08-21 18:53:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:37,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:37,274 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 18:53:37,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226927507] [2021-08-21 18:53:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226927507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135462578] [2021-08-21 18:53:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:37,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:37,275 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 18:53:37,276 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 18:53:37,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:37,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:37,991 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 18:53:37,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135462578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:37,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:37,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:37,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435431396] [2021-08-21 18:53:37,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:37,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:37,992 INFO L87 Difference]: Start difference. First operand 14938 states and 27027 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:38,083 INFO L93 Difference]: Finished difference Result 16419 states and 29993 transitions. [2021-08-21 18:53:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:38,108 INFO L225 Difference]: With dead ends: 16419 [2021-08-21 18:53:38,108 INFO L226 Difference]: Without dead ends: 16410 [2021-08-21 18:53:38,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16410 states. [2021-08-21 18:53:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16410 to 14958. [2021-08-21 18:53:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14958 states, 14957 states have (on average 1.812729825499766) internal successors, (27113), 14957 states have internal predecessors, (27113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 27113 transitions. [2021-08-21 18:53:38,314 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 27113 transitions. Word has length 32 [2021-08-21 18:53:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:38,314 INFO L470 AbstractCegarLoop]: Abstraction has 14958 states and 27113 transitions. [2021-08-21 18:53:38,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 27113 transitions. [2021-08-21 18:53:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:38,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:38,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:38,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 18:53:38,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:53:38,536 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash -740948480, now seen corresponding path program 1 times [2021-08-21 18:53:38,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:38,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283020559] [2021-08-21 18:53:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:38,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:38,570 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 18:53:38,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:38,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283020559] [2021-08-21 18:53:38,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283020559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:38,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:53:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256313690] [2021-08-21 18:53:38,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:38,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:38,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:38,571 INFO L87 Difference]: Start difference. First operand 14958 states and 27113 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:38,665 INFO L93 Difference]: Finished difference Result 16665 states and 30366 transitions. [2021-08-21 18:53:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:38,690 INFO L225 Difference]: With dead ends: 16665 [2021-08-21 18:53:38,690 INFO L226 Difference]: Without dead ends: 16652 [2021-08-21 18:53:38,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-08-21 18:53:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 14991. [2021-08-21 18:53:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 1.8152101400933955) internal successors, (27210), 14990 states have internal predecessors, (27210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 27210 transitions. [2021-08-21 18:53:38,883 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 27210 transitions. Word has length 32 [2021-08-21 18:53:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:38,884 INFO L470 AbstractCegarLoop]: Abstraction has 14991 states and 27210 transitions. [2021-08-21 18:53:38,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 27210 transitions. [2021-08-21 18:53:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:38,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:38,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:38,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-21 18:53:38,903 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash 991346816, now seen corresponding path program 2 times [2021-08-21 18:53:38,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:38,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502989025] [2021-08-21 18:53:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:38,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:38,936 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 18:53:38,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:38,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502989025] [2021-08-21 18:53:38,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502989025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:38,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170760054] [2021-08-21 18:53:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:38,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:38,937 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 18:53:38,938 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 18:53:39,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:39,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:39,660 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 18:53:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170760054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:39,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:39,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256338064] [2021-08-21 18:53:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:39,661 INFO L87 Difference]: Start difference. First operand 14991 states and 27210 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:39,756 INFO L93 Difference]: Finished difference Result 16524 states and 30381 transitions. [2021-08-21 18:53:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:39,782 INFO L225 Difference]: With dead ends: 16524 [2021-08-21 18:53:39,783 INFO L226 Difference]: Without dead ends: 16515 [2021-08-21 18:53:39,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 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 18:53:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16515 states. [2021-08-21 18:53:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16515 to 15021. [2021-08-21 18:53:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15021 states, 15020 states have (on average 1.8209720372836218) internal successors, (27351), 15020 states have internal predecessors, (27351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15021 states to 15021 states and 27351 transitions. [2021-08-21 18:53:39,963 INFO L78 Accepts]: Start accepts. Automaton has 15021 states and 27351 transitions. Word has length 32 [2021-08-21 18:53:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:39,963 INFO L470 AbstractCegarLoop]: Abstraction has 15021 states and 27351 transitions. [2021-08-21 18:53:39,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 15021 states and 27351 transitions. [2021-08-21 18:53:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:39,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:39,983 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] [2021-08-21 18:53:40,002 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 18:53:40,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:40,184 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash 374159484, now seen corresponding path program 2 times [2021-08-21 18:53:40,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:40,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698301847] [2021-08-21 18:53:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:40,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:40,224 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 18:53:40,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:40,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698301847] [2021-08-21 18:53:40,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698301847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008150430] [2021-08-21 18:53:40,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:40,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:40,225 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 18:53:40,225 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 18:53:40,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:40,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:40,968 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 18:53:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008150430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:40,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:40,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615111861] [2021-08-21 18:53:40,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:40,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:40,970 INFO L87 Difference]: Start difference. First operand 15021 states and 27351 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:41,067 INFO L93 Difference]: Finished difference Result 16582 states and 30556 transitions. [2021-08-21 18:53:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:41,091 INFO L225 Difference]: With dead ends: 16582 [2021-08-21 18:53:41,091 INFO L226 Difference]: Without dead ends: 16573 [2021-08-21 18:53:41,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-08-21 18:53:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 15056. [2021-08-21 18:53:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15056 states, 15055 states have (on average 1.8261042842909332) internal successors, (27492), 15055 states have internal predecessors, (27492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15056 states to 15056 states and 27492 transitions. [2021-08-21 18:53:41,273 INFO L78 Accepts]: Start accepts. Automaton has 15056 states and 27492 transitions. Word has length 32 [2021-08-21 18:53:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:41,273 INFO L470 AbstractCegarLoop]: Abstraction has 15056 states and 27492 transitions. [2021-08-21 18:53:41,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15056 states and 27492 transitions. [2021-08-21 18:53:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:41,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:41,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:41,310 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 18:53:41,493 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,SelfDestructingSolverStorable62 [2021-08-21 18:53:41,493 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -243027848, now seen corresponding path program 2 times [2021-08-21 18:53:41,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:41,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060313411] [2021-08-21 18:53:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:41,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:41,534 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 18:53:41,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:41,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060313411] [2021-08-21 18:53:41,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060313411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:41,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238558095] [2021-08-21 18:53:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:41,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:41,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:41,536 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 18:53:41,537 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 18:53:42,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:42,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:42,293 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 18:53:42,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238558095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:42,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:42,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702417814] [2021-08-21 18:53:42,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:42,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:42,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:42,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:42,294 INFO L87 Difference]: Start difference. First operand 15056 states and 27492 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:42,378 INFO L93 Difference]: Finished difference Result 16515 states and 30444 transitions. [2021-08-21 18:53:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:42,402 INFO L225 Difference]: With dead ends: 16515 [2021-08-21 18:53:42,402 INFO L226 Difference]: Without dead ends: 16506 [2021-08-21 18:53:42,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16506 states. [2021-08-21 18:53:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16506 to 15076. [2021-08-21 18:53:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15076 states, 15075 states have (on average 1.8293864013266998) internal successors, (27578), 15075 states have internal predecessors, (27578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15076 states to 15076 states and 27578 transitions. [2021-08-21 18:53:42,585 INFO L78 Accepts]: Start accepts. Automaton has 15076 states and 27578 transitions. Word has length 32 [2021-08-21 18:53:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:42,586 INFO L470 AbstractCegarLoop]: Abstraction has 15076 states and 27578 transitions. [2021-08-21 18:53:42,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 15076 states and 27578 transitions. [2021-08-21 18:53:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:53:42,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:42,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:42,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:53:42,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,806 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash -860215180, now seen corresponding path program 2 times [2021-08-21 18:53:42,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:42,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451683359] [2021-08-21 18:53:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:42,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:42,842 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 18:53:42,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:42,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451683359] [2021-08-21 18:53:42,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451683359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960126202] [2021-08-21 18:53:42,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:42,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:42,844 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 18:53:42,845 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 18:53:43,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:53:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:43,625 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 18:53:43,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960126202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:43,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:43,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:53:43,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103737873] [2021-08-21 18:53:43,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:53:43,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:53:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:53:43,626 INFO L87 Difference]: Start difference. First operand 15076 states and 27578 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:43,707 INFO L93 Difference]: Finished difference Result 16591 states and 30585 transitions. [2021-08-21 18:53:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:53:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 18:53:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:43,730 INFO L225 Difference]: With dead ends: 16591 [2021-08-21 18:53:43,731 INFO L226 Difference]: Without dead ends: 16582 [2021-08-21 18:53:43,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 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 18:53:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16582 states. [2021-08-21 18:53:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16582 to 15101. [2021-08-21 18:53:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15101 states, 15100 states have (on average 1.8327152317880795) internal successors, (27674), 15100 states have internal predecessors, (27674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15101 states to 15101 states and 27674 transitions. [2021-08-21 18:53:43,909 INFO L78 Accepts]: Start accepts. Automaton has 15101 states and 27674 transitions. Word has length 32 [2021-08-21 18:53:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:43,909 INFO L470 AbstractCegarLoop]: Abstraction has 15101 states and 27674 transitions. [2021-08-21 18:53:43,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 15101 states and 27674 transitions. [2021-08-21 18:53:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:43,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:43,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:43,946 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 18:53:44,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:44,129 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1108648644, now seen corresponding path program 1 times [2021-08-21 18:53:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:44,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537189618] [2021-08-21 18:53:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:44,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:44,221 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 18:53:44,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:44,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537189618] [2021-08-21 18:53:44,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537189618] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:44,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:44,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:44,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595886140] [2021-08-21 18:53:44,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:44,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,222 INFO L87 Difference]: Start difference. First operand 15101 states and 27674 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:44,342 INFO L93 Difference]: Finished difference Result 17112 states and 31793 transitions. [2021-08-21 18:53:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:44,366 INFO L225 Difference]: With dead ends: 17112 [2021-08-21 18:53:44,366 INFO L226 Difference]: Without dead ends: 17103 [2021-08-21 18:53:44,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17103 states. [2021-08-21 18:53:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17103 to 15065. [2021-08-21 18:53:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 1.8223579394583111) internal successors, (27452), 15064 states have internal predecessors, (27452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 27452 transitions. [2021-08-21 18:53:44,545 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 27452 transitions. Word has length 35 [2021-08-21 18:53:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:44,545 INFO L470 AbstractCegarLoop]: Abstraction has 15065 states and 27452 transitions. [2021-08-21 18:53:44,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 27452 transitions. [2021-08-21 18:53:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:44,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:44,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:44,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-21 18:53:44,564 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 84706888, now seen corresponding path program 1 times [2021-08-21 18:53:44,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:44,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107710580] [2021-08-21 18:53:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:44,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:44,614 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 18:53:44,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:44,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107710580] [2021-08-21 18:53:44,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107710580] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:44,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:44,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:44,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94918285] [2021-08-21 18:53:44,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:44,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,615 INFO L87 Difference]: Start difference. First operand 15065 states and 27452 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:44,730 INFO L93 Difference]: Finished difference Result 17147 states and 31812 transitions. [2021-08-21 18:53:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:44,754 INFO L225 Difference]: With dead ends: 17147 [2021-08-21 18:53:44,754 INFO L226 Difference]: Without dead ends: 17138 [2021-08-21 18:53:44,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17138 states. [2021-08-21 18:53:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17138 to 15105. [2021-08-21 18:53:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15105 states, 15104 states have (on average 1.8323622881355932) internal successors, (27676), 15104 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15105 states to 15105 states and 27676 transitions. [2021-08-21 18:53:44,938 INFO L78 Accepts]: Start accepts. Automaton has 15105 states and 27676 transitions. Word has length 35 [2021-08-21 18:53:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:44,938 INFO L470 AbstractCegarLoop]: Abstraction has 15105 states and 27676 transitions. [2021-08-21 18:53:44,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 15105 states and 27676 transitions. [2021-08-21 18:53:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:44,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:44,959 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, 1, 1, 1] [2021-08-21 18:53:44,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-21 18:53:44,959 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:44,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1423797436, now seen corresponding path program 1 times [2021-08-21 18:53:44,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:44,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097849099] [2021-08-21 18:53:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:44,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:45,017 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 18:53:45,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097849099] [2021-08-21 18:53:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097849099] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:45,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:45,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:45,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938905904] [2021-08-21 18:53:45,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:45,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:45,018 INFO L87 Difference]: Start difference. First operand 15105 states and 27676 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:45,147 INFO L93 Difference]: Finished difference Result 17109 states and 31776 transitions. [2021-08-21 18:53:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:45,177 INFO L225 Difference]: With dead ends: 17109 [2021-08-21 18:53:45,177 INFO L226 Difference]: Without dead ends: 17100 [2021-08-21 18:53:45,177 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 18:53:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-08-21 18:53:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 15107. [2021-08-21 18:53:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15107 states, 15106 states have (on average 1.8325830795710314) internal successors, (27683), 15106 states have internal predecessors, (27683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15107 states to 15107 states and 27683 transitions. [2021-08-21 18:53:45,376 INFO L78 Accepts]: Start accepts. Automaton has 15107 states and 27683 transitions. Word has length 35 [2021-08-21 18:53:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:45,376 INFO L470 AbstractCegarLoop]: Abstraction has 15107 states and 27683 transitions. [2021-08-21 18:53:45,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 15107 states and 27683 transitions. [2021-08-21 18:53:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:45,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:45,396 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, 1, 1, 1] [2021-08-21 18:53:45,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-21 18:53:45,396 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1790185532, now seen corresponding path program 1 times [2021-08-21 18:53:45,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:45,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937897141] [2021-08-21 18:53:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:45,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:45,443 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 18:53:45,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:45,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937897141] [2021-08-21 18:53:45,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937897141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:45,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:45,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:45,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201607230] [2021-08-21 18:53:45,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:45,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:45,444 INFO L87 Difference]: Start difference. First operand 15107 states and 27683 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:45,566 INFO L93 Difference]: Finished difference Result 16981 states and 31384 transitions. [2021-08-21 18:53:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:45,592 INFO L225 Difference]: With dead ends: 16981 [2021-08-21 18:53:45,592 INFO L226 Difference]: Without dead ends: 16972 [2021-08-21 18:53:45,592 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 18:53:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16972 states. [2021-08-21 18:53:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16972 to 15106. [2021-08-21 18:53:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15106 states, 15105 states have (on average 1.8325057927838464) internal successors, (27680), 15105 states have internal predecessors, (27680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15106 states to 15106 states and 27680 transitions. [2021-08-21 18:53:45,776 INFO L78 Accepts]: Start accepts. Automaton has 15106 states and 27680 transitions. Word has length 35 [2021-08-21 18:53:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 15106 states and 27680 transitions. [2021-08-21 18:53:45,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15106 states and 27680 transitions. [2021-08-21 18:53:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:45,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:45,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:45,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-21 18:53:45,796 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash -859859312, now seen corresponding path program 1 times [2021-08-21 18:53:45,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:45,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603276984] [2021-08-21 18:53:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:45,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:45,844 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 18:53:45,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:45,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603276984] [2021-08-21 18:53:45,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603276984] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:45,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:45,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:45,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647595138] [2021-08-21 18:53:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:45,845 INFO L87 Difference]: Start difference. First operand 15106 states and 27680 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:45,955 INFO L93 Difference]: Finished difference Result 17070 states and 31418 transitions. [2021-08-21 18:53:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:45,979 INFO L225 Difference]: With dead ends: 17070 [2021-08-21 18:53:45,979 INFO L226 Difference]: Without dead ends: 17057 [2021-08-21 18:53:45,980 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 18:53:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17057 states. [2021-08-21 18:53:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17057 to 15103. [2021-08-21 18:53:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15103 states, 15102 states have (on average 1.8322076546152828) internal successors, (27670), 15102 states have internal predecessors, (27670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15103 states to 15103 states and 27670 transitions. [2021-08-21 18:53:46,235 INFO L78 Accepts]: Start accepts. Automaton has 15103 states and 27670 transitions. Word has length 35 [2021-08-21 18:53:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:46,236 INFO L470 AbstractCegarLoop]: Abstraction has 15103 states and 27670 transitions. [2021-08-21 18:53:46,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15103 states and 27670 transitions. [2021-08-21 18:53:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:46,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:46,254 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:46,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-21 18:53:46,254 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash 597288336, now seen corresponding path program 1 times [2021-08-21 18:53:46,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:46,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659951438] [2021-08-21 18:53:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:46,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:46,297 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 18:53:46,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:46,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659951438] [2021-08-21 18:53:46,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659951438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:46,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:46,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:46,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377200805] [2021-08-21 18:53:46,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:46,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:46,299 INFO L87 Difference]: Start difference. First operand 15103 states and 27670 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:46,413 INFO L93 Difference]: Finished difference Result 17139 states and 31855 transitions. [2021-08-21 18:53:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:46,437 INFO L225 Difference]: With dead ends: 17139 [2021-08-21 18:53:46,437 INFO L226 Difference]: Without dead ends: 17130 [2021-08-21 18:53:46,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17130 states. [2021-08-21 18:53:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17130 to 15103. [2021-08-21 18:53:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15103 states, 15102 states have (on average 1.830618461130976) internal successors, (27646), 15102 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15103 states to 15103 states and 27646 transitions. [2021-08-21 18:53:46,624 INFO L78 Accepts]: Start accepts. Automaton has 15103 states and 27646 transitions. Word has length 35 [2021-08-21 18:53:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:46,624 INFO L470 AbstractCegarLoop]: Abstraction has 15103 states and 27646 transitions. [2021-08-21 18:53:46,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15103 states and 27646 transitions. [2021-08-21 18:53:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:46,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:46,644 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, 1, 1, 1] [2021-08-21 18:53:46,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 18:53:46,644 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1687513864, now seen corresponding path program 2 times [2021-08-21 18:53:46,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:46,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917325085] [2021-08-21 18:53:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:46,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:46,692 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 18:53:46,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917325085] [2021-08-21 18:53:46,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917325085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683377116] [2021-08-21 18:53:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:46,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:46,693 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 18:53:46,693 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 18:53:47,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:47,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:47,493 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 18:53:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683377116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:47,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:47,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:47,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178883983] [2021-08-21 18:53:47,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:47,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:47,494 INFO L87 Difference]: Start difference. First operand 15103 states and 27646 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:47,614 INFO L93 Difference]: Finished difference Result 16904 states and 31380 transitions. [2021-08-21 18:53:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:47,637 INFO L225 Difference]: With dead ends: 16904 [2021-08-21 18:53:47,637 INFO L226 Difference]: Without dead ends: 16895 [2021-08-21 18:53:47,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16895 states. [2021-08-21 18:53:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16895 to 15139. [2021-08-21 18:53:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15139 states, 15138 states have (on average 1.8363059849385652) internal successors, (27798), 15138 states have internal predecessors, (27798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15139 states to 15139 states and 27798 transitions. [2021-08-21 18:53:47,815 INFO L78 Accepts]: Start accepts. Automaton has 15139 states and 27798 transitions. Word has length 35 [2021-08-21 18:53:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:47,816 INFO L470 AbstractCegarLoop]: Abstraction has 15139 states and 27798 transitions. [2021-08-21 18:53:47,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 15139 states and 27798 transitions. [2021-08-21 18:53:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:47,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:47,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:47,852 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 18:53:48,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:48,035 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1563032444, now seen corresponding path program 2 times [2021-08-21 18:53:48,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:48,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412563444] [2021-08-21 18:53:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:48,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:48,078 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 18:53:48,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:48,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412563444] [2021-08-21 18:53:48,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412563444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416085866] [2021-08-21 18:53:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:48,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:48,079 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 18:53:48,112 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 18:53:48,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:48,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:48,916 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 18:53:48,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416085866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:48,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:48,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522795683] [2021-08-21 18:53:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:48,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:48,917 INFO L87 Difference]: Start difference. First operand 15139 states and 27798 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:49,039 INFO L93 Difference]: Finished difference Result 16932 states and 31528 transitions. [2021-08-21 18:53:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:49,063 INFO L225 Difference]: With dead ends: 16932 [2021-08-21 18:53:49,063 INFO L226 Difference]: Without dead ends: 16923 [2021-08-21 18:53:49,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2021-08-21 18:53:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 15169. [2021-08-21 18:53:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15169 states, 15168 states have (on average 1.8425632911392404) internal successors, (27948), 15168 states have internal predecessors, (27948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15169 states to 15169 states and 27948 transitions. [2021-08-21 18:53:49,248 INFO L78 Accepts]: Start accepts. Automaton has 15169 states and 27948 transitions. Word has length 35 [2021-08-21 18:53:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:49,248 INFO L470 AbstractCegarLoop]: Abstraction has 15169 states and 27948 transitions. [2021-08-21 18:53:49,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15169 states and 27948 transitions. [2021-08-21 18:53:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:49,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:49,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:49,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 18:53:49,467 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,SelfDestructingSolverStorable72 [2021-08-21 18:53:49,467 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash -177746296, now seen corresponding path program 1 times [2021-08-21 18:53:49,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:49,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066348745] [2021-08-21 18:53:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:49,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:49,515 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 18:53:49,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:49,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066348745] [2021-08-21 18:53:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066348745] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:49,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:49,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:49,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553287296] [2021-08-21 18:53:49,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:49,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:49,516 INFO L87 Difference]: Start difference. First operand 15169 states and 27948 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:49,628 INFO L93 Difference]: Finished difference Result 17359 states and 32665 transitions. [2021-08-21 18:53:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:49,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:49,652 INFO L225 Difference]: With dead ends: 17359 [2021-08-21 18:53:49,653 INFO L226 Difference]: Without dead ends: 17350 [2021-08-21 18:53:49,653 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 18:53:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-08-21 18:53:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 15272. [2021-08-21 18:53:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15272 states, 15271 states have (on average 1.8596031694060637) internal successors, (28398), 15271 states have internal predecessors, (28398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15272 states to 15272 states and 28398 transitions. [2021-08-21 18:53:49,834 INFO L78 Accepts]: Start accepts. Automaton has 15272 states and 28398 transitions. Word has length 35 [2021-08-21 18:53:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 15272 states and 28398 transitions. [2021-08-21 18:53:49,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15272 states and 28398 transitions. [2021-08-21 18:53:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:49,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:49,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:49,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-21 18:53:49,854 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1161344252, now seen corresponding path program 1 times [2021-08-21 18:53:49,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:49,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601495225] [2021-08-21 18:53:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:49,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:49,900 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 18:53:49,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:49,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601495225] [2021-08-21 18:53:49,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601495225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:49,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:49,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:49,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569400266] [2021-08-21 18:53:49,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:49,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:49,901 INFO L87 Difference]: Start difference. First operand 15272 states and 28398 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,019 INFO L93 Difference]: Finished difference Result 17380 states and 32869 transitions. [2021-08-21 18:53:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:50,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,044 INFO L225 Difference]: With dead ends: 17380 [2021-08-21 18:53:50,044 INFO L226 Difference]: Without dead ends: 17371 [2021-08-21 18:53:50,044 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 18:53:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2021-08-21 18:53:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 15325. [2021-08-21 18:53:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15325 states, 15324 states have (on average 1.8698773166275124) internal successors, (28654), 15324 states have internal predecessors, (28654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15325 states to 15325 states and 28654 transitions. [2021-08-21 18:53:50,236 INFO L78 Accepts]: Start accepts. Automaton has 15325 states and 28654 transitions. Word has length 35 [2021-08-21 18:53:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:50,236 INFO L470 AbstractCegarLoop]: Abstraction has 15325 states and 28654 transitions. [2021-08-21 18:53:50,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 15325 states and 28654 transitions. [2021-08-21 18:53:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:50,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:50,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:50,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-21 18:53:50,257 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1527732348, now seen corresponding path program 1 times [2021-08-21 18:53:50,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:50,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593424908] [2021-08-21 18:53:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:50,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:50,311 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 18:53:50,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:50,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593424908] [2021-08-21 18:53:50,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593424908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:50,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:50,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:50,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926050332] [2021-08-21 18:53:50,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:50,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,312 INFO L87 Difference]: Start difference. First operand 15325 states and 28654 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,439 INFO L93 Difference]: Finished difference Result 17284 states and 32620 transitions. [2021-08-21 18:53:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,466 INFO L225 Difference]: With dead ends: 17284 [2021-08-21 18:53:50,466 INFO L226 Difference]: Without dead ends: 17275 [2021-08-21 18:53:50,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2021-08-21 18:53:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 15344. [2021-08-21 18:53:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15344 states, 15343 states have (on average 1.8731017402072607) internal successors, (28739), 15343 states have internal predecessors, (28739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15344 states to 15344 states and 28739 transitions. [2021-08-21 18:53:50,671 INFO L78 Accepts]: Start accepts. Automaton has 15344 states and 28739 transitions. Word has length 35 [2021-08-21 18:53:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:50,672 INFO L470 AbstractCegarLoop]: Abstraction has 15344 states and 28739 transitions. [2021-08-21 18:53:50,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 15344 states and 28739 transitions. [2021-08-21 18:53:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:50,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:50,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:50,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-21 18:53:50,692 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312496, now seen corresponding path program 1 times [2021-08-21 18:53:50,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:50,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706491302] [2021-08-21 18:53:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:50,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:50,739 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 18:53:50,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:50,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706491302] [2021-08-21 18:53:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706491302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12257693] [2021-08-21 18:53:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,740 INFO L87 Difference]: Start difference. First operand 15344 states and 28739 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,854 INFO L93 Difference]: Finished difference Result 17406 states and 32782 transitions. [2021-08-21 18:53:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,883 INFO L225 Difference]: With dead ends: 17406 [2021-08-21 18:53:50,883 INFO L226 Difference]: Without dead ends: 17393 [2021-08-21 18:53:50,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-08-21 18:53:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15375. [2021-08-21 18:53:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15375 states, 15374 states have (on average 1.8768700403278262) internal successors, (28855), 15374 states have internal predecessors, (28855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15375 states to 15375 states and 28855 transitions. [2021-08-21 18:53:51,082 INFO L78 Accepts]: Start accepts. Automaton has 15375 states and 28855 transitions. Word has length 35 [2021-08-21 18:53:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:51,082 INFO L470 AbstractCegarLoop]: Abstraction has 15375 states and 28855 transitions. [2021-08-21 18:53:51,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15375 states and 28855 transitions. [2021-08-21 18:53:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:51,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:51,105 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:51,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-21 18:53:51,105 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash 334835152, now seen corresponding path program 1 times [2021-08-21 18:53:51,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:51,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484857571] [2021-08-21 18:53:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:51,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:51,154 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 18:53:51,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:51,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484857571] [2021-08-21 18:53:51,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484857571] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:51,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:51,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:51,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869636068] [2021-08-21 18:53:51,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:51,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:51,155 INFO L87 Difference]: Start difference. First operand 15375 states and 28855 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:51,286 INFO L93 Difference]: Finished difference Result 17550 states and 33496 transitions. [2021-08-21 18:53:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:51,312 INFO L225 Difference]: With dead ends: 17550 [2021-08-21 18:53:51,313 INFO L226 Difference]: Without dead ends: 17541 [2021-08-21 18:53:51,313 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 18:53:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17541 states. [2021-08-21 18:53:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17541 to 15458. [2021-08-21 18:53:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15458 states, 15457 states have (on average 1.8884000776347285) internal successors, (29189), 15457 states have internal predecessors, (29189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15458 states to 15458 states and 29189 transitions. [2021-08-21 18:53:51,522 INFO L78 Accepts]: Start accepts. Automaton has 15458 states and 29189 transitions. Word has length 35 [2021-08-21 18:53:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:51,522 INFO L470 AbstractCegarLoop]: Abstraction has 15458 states and 29189 transitions. [2021-08-21 18:53:51,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15458 states and 29189 transitions. [2021-08-21 18:53:51,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:51,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:51,543 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, 1, 1, 1] [2021-08-21 18:53:51,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-21 18:53:51,543 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1921496580, now seen corresponding path program 2 times [2021-08-21 18:53:51,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:51,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392118838] [2021-08-21 18:53:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:51,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:51,590 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 18:53:51,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392118838] [2021-08-21 18:53:51,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392118838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43410663] [2021-08-21 18:53:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:51,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:51,591 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 18:53:51,591 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 18:53:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:52,499 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 18:53:52,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43410663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:52,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:52,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:52,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220881198] [2021-08-21 18:53:52,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:52,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:52,500 INFO L87 Difference]: Start difference. First operand 15458 states and 29189 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:52,620 INFO L93 Difference]: Finished difference Result 17363 states and 33191 transitions. [2021-08-21 18:53:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:52,645 INFO L225 Difference]: With dead ends: 17363 [2021-08-21 18:53:52,645 INFO L226 Difference]: Without dead ends: 17354 [2021-08-21 18:53:52,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:53:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17354 states. [2021-08-21 18:53:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17354 to 15488. [2021-08-21 18:53:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15488 states, 15487 states have (on average 1.8931361787305483) internal successors, (29319), 15487 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15488 states to 15488 states and 29319 transitions. [2021-08-21 18:53:52,833 INFO L78 Accepts]: Start accepts. Automaton has 15488 states and 29319 transitions. Word has length 35 [2021-08-21 18:53:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:52,833 INFO L470 AbstractCegarLoop]: Abstraction has 15488 states and 29319 transitions. [2021-08-21 18:53:52,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15488 states and 29319 transitions. [2021-08-21 18:53:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:52,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:52,853 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, 1, 1, 1] [2021-08-21 18:53:52,872 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 18:53:53,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:53,053 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1577738352, now seen corresponding path program 2 times [2021-08-21 18:53:53,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:53,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422472339] [2021-08-21 18:53:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:53,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:53,107 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 18:53:53,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:53,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422472339] [2021-08-21 18:53:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422472339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:53,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409812058] [2021-08-21 18:53:53,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:53,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:53,109 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 18:53:53,136 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 18:53:53,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:53,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:54,014 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 18:53:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409812058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:54,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:54,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687432813] [2021-08-21 18:53:54,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:54,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:54,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,015 INFO L87 Difference]: Start difference. First operand 15488 states and 29319 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:54,173 INFO L93 Difference]: Finished difference Result 17334 states and 33177 transitions. [2021-08-21 18:53:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:54,204 INFO L225 Difference]: With dead ends: 17334 [2021-08-21 18:53:54,204 INFO L226 Difference]: Without dead ends: 17325 [2021-08-21 18:53:54,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17325 states. [2021-08-21 18:53:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17325 to 15512. [2021-08-21 18:53:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15512 states, 15511 states have (on average 1.89729869125137) internal successors, (29429), 15511 states have internal predecessors, (29429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15512 states to 15512 states and 29429 transitions. [2021-08-21 18:53:54,406 INFO L78 Accepts]: Start accepts. Automaton has 15512 states and 29429 transitions. Word has length 35 [2021-08-21 18:53:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:54,407 INFO L470 AbstractCegarLoop]: Abstraction has 15512 states and 29429 transitions. [2021-08-21 18:53:54,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 15512 states and 29429 transitions. [2021-08-21 18:53:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:54,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:54,427 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, 1, 1, 1] [2021-08-21 18:53:54,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:53:54,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:54,628 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1323278224, now seen corresponding path program 1 times [2021-08-21 18:53:54,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:54,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305193826] [2021-08-21 18:53:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:54,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:54,676 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 18:53:54,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:54,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305193826] [2021-08-21 18:53:54,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305193826] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:54,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:54,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:54,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041496710] [2021-08-21 18:53:54,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:54,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:54,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,677 INFO L87 Difference]: Start difference. First operand 15512 states and 29429 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:54,799 INFO L93 Difference]: Finished difference Result 17639 states and 33836 transitions. [2021-08-21 18:53:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:54,825 INFO L225 Difference]: With dead ends: 17639 [2021-08-21 18:53:54,826 INFO L226 Difference]: Without dead ends: 17630 [2021-08-21 18:53:54,826 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 18:53:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17630 states. [2021-08-21 18:53:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17630 to 15545. [2021-08-21 18:53:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15545 states, 15544 states have (on average 1.9016340710241895) internal successors, (29559), 15544 states have internal predecessors, (29559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15545 states to 15545 states and 29559 transitions. [2021-08-21 18:53:55,023 INFO L78 Accepts]: Start accepts. Automaton has 15545 states and 29559 transitions. Word has length 35 [2021-08-21 18:53:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 15545 states and 29559 transitions. [2021-08-21 18:53:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15545 states and 29559 transitions. [2021-08-21 18:53:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:55,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:55,044 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 18:53:55,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-21 18:53:55,044 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash -956890128, now seen corresponding path program 1 times [2021-08-21 18:53:55,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:55,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733868619] [2021-08-21 18:53:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:55,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:55,090 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 18:53:55,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:55,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733868619] [2021-08-21 18:53:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733868619] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:55,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:55,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:55,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171979210] [2021-08-21 18:53:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:55,091 INFO L87 Difference]: Start difference. First operand 15545 states and 29559 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:55,199 INFO L93 Difference]: Finished difference Result 17522 states and 33527 transitions. [2021-08-21 18:53:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:55,225 INFO L225 Difference]: With dead ends: 17522 [2021-08-21 18:53:55,225 INFO L226 Difference]: Without dead ends: 17513 [2021-08-21 18:53:55,225 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 18:53:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17513 states. [2021-08-21 18:53:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17513 to 15563. [2021-08-21 18:53:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15563 states, 15562 states have (on average 1.9038041382855675) internal successors, (29627), 15562 states have internal predecessors, (29627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15563 states to 15563 states and 29627 transitions. [2021-08-21 18:53:55,418 INFO L78 Accepts]: Start accepts. Automaton has 15563 states and 29627 transitions. Word has length 35 [2021-08-21 18:53:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:55,418 INFO L470 AbstractCegarLoop]: Abstraction has 15563 states and 29627 transitions. [2021-08-21 18:53:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 15563 states and 29627 transitions. [2021-08-21 18:53:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:55,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:55,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:55,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-21 18:53:55,439 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash 688032324, now seen corresponding path program 1 times [2021-08-21 18:53:55,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:55,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160737262] [2021-08-21 18:53:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:55,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:55,499 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 18:53:55,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:55,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160737262] [2021-08-21 18:53:55,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160737262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:55,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:55,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:55,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253522631] [2021-08-21 18:53:55,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:55,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:55,500 INFO L87 Difference]: Start difference. First operand 15563 states and 29627 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:55,606 INFO L93 Difference]: Finished difference Result 17634 states and 33630 transitions. [2021-08-21 18:53:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:55,632 INFO L225 Difference]: With dead ends: 17634 [2021-08-21 18:53:55,632 INFO L226 Difference]: Without dead ends: 17621 [2021-08-21 18:53:55,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 18:53:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17621 states. [2021-08-21 18:53:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17621 to 15583. [2021-08-21 18:53:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 15582 states have (on average 1.905082787832114) internal successors, (29685), 15582 states have internal predecessors, (29685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 29685 transitions. [2021-08-21 18:53:55,824 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 29685 transitions. Word has length 35 [2021-08-21 18:53:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:55,824 INFO L470 AbstractCegarLoop]: Abstraction has 15583 states and 29685 transitions. [2021-08-21 18:53:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 29685 transitions. [2021-08-21 18:53:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:55,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:55,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-21 18:53:55,844 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2145179972, now seen corresponding path program 1 times [2021-08-21 18:53:55,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:55,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704910688] [2021-08-21 18:53:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:55,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:55,893 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 18:53:55,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:55,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704910688] [2021-08-21 18:53:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704910688] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:55,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:55,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:55,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132251861] [2021-08-21 18:53:55,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:55,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:55,894 INFO L87 Difference]: Start difference. First operand 15583 states and 29685 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:56,008 INFO L93 Difference]: Finished difference Result 17757 states and 34193 transitions. [2021-08-21 18:53:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:56,038 INFO L225 Difference]: With dead ends: 17757 [2021-08-21 18:53:56,038 INFO L226 Difference]: Without dead ends: 17748 [2021-08-21 18:53:56,038 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 18:53:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-08-21 18:53:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 15617. [2021-08-21 18:53:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15617 states, 15616 states have (on average 1.9085553278688525) internal successors, (29804), 15616 states have internal predecessors, (29804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15617 states to 15617 states and 29804 transitions. [2021-08-21 18:53:56,255 INFO L78 Accepts]: Start accepts. Automaton has 15617 states and 29804 transitions. Word has length 35 [2021-08-21 18:53:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 15617 states and 29804 transitions. [2021-08-21 18:53:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 15617 states and 29804 transitions. [2021-08-21 18:53:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:56,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:56,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:56,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-21 18:53:56,278 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1466648844, now seen corresponding path program 2 times [2021-08-21 18:53:56,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:56,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294694169] [2021-08-21 18:53:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:56,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:56,324 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 18:53:56,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:56,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294694169] [2021-08-21 18:53:56,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294694169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662789134] [2021-08-21 18:53:56,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:56,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:56,325 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 18:53:56,326 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 18:53:57,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:57,257 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 18:53:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662789134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:57,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:57,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:57,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648438402] [2021-08-21 18:53:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:57,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:57,258 INFO L87 Difference]: Start difference. First operand 15617 states and 29804 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:57,388 INFO L93 Difference]: Finished difference Result 17535 states and 33817 transitions. [2021-08-21 18:53:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:57,415 INFO L225 Difference]: With dead ends: 17535 [2021-08-21 18:53:57,415 INFO L226 Difference]: Without dead ends: 17526 [2021-08-21 18:53:57,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:53:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17526 states. [2021-08-21 18:53:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17526 to 15641. [2021-08-21 18:53:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15641 states, 15640 states have (on average 1.9121483375959079) internal successors, (29906), 15640 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 18:53:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 29906 transitions. [2021-08-21 18:53:57,613 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 29906 transitions. Word has length 35 [2021-08-21 18:53:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 15641 states and 29906 transitions. [2021-08-21 18:53:57,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 29906 transitions. [2021-08-21 18:53:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:57,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:57,635 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, 1, 1, 1] [2021-08-21 18:53:57,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:53:57,835 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,SelfDestructingSolverStorable84 [2021-08-21 18:53:57,835 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash 233380092, now seen corresponding path program 1 times [2021-08-21 18:53:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:57,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60682497] [2021-08-21 18:53:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:57,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:57,882 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 18:53:57,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:57,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60682497] [2021-08-21 18:53:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60682497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:57,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:57,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:57,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506510665] [2021-08-21 18:53:57,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:57,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:57,884 INFO L87 Difference]: Start difference. First operand 15641 states and 29906 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:57,996 INFO L93 Difference]: Finished difference Result 17600 states and 33888 transitions. [2021-08-21 18:53:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:58,023 INFO L225 Difference]: With dead ends: 17600 [2021-08-21 18:53:58,023 INFO L226 Difference]: Without dead ends: 17591 [2021-08-21 18:53:58,024 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 18:53:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17591 states. [2021-08-21 18:53:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17591 to 15664. [2021-08-21 18:53:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15664 states, 15663 states have (on average 1.9152780437974846) internal successors, (29999), 15663 states have internal predecessors, (29999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15664 states to 15664 states and 29999 transitions. [2021-08-21 18:53:58,228 INFO L78 Accepts]: Start accepts. Automaton has 15664 states and 29999 transitions. Word has length 35 [2021-08-21 18:53:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:58,229 INFO L470 AbstractCegarLoop]: Abstraction has 15664 states and 29999 transitions. [2021-08-21 18:53:58,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 15664 states and 29999 transitions. [2021-08-21 18:53:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:58,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:58,251 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:58,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-21 18:53:58,252 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1878302544, now seen corresponding path program 1 times [2021-08-21 18:53:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:58,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584773340] [2021-08-21 18:53:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:58,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:58,299 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 18:53:58,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:58,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584773340] [2021-08-21 18:53:58,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584773340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:58,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:58,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:58,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961100725] [2021-08-21 18:53:58,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:58,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,300 INFO L87 Difference]: Start difference. First operand 15664 states and 29999 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:58,424 INFO L93 Difference]: Finished difference Result 17718 states and 34012 transitions. [2021-08-21 18:53:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:58,457 INFO L225 Difference]: With dead ends: 17718 [2021-08-21 18:53:58,457 INFO L226 Difference]: Without dead ends: 17705 [2021-08-21 18:53:58,457 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 18:53:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17705 states. [2021-08-21 18:53:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17705 to 15685. [2021-08-21 18:53:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15685 states, 15684 states have (on average 1.9167304259117572) internal successors, (30062), 15684 states have internal predecessors, (30062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15685 states to 15685 states and 30062 transitions. [2021-08-21 18:53:58,674 INFO L78 Accepts]: Start accepts. Automaton has 15685 states and 30062 transitions. Word has length 35 [2021-08-21 18:53:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:58,674 INFO L470 AbstractCegarLoop]: Abstraction has 15685 states and 30062 transitions. [2021-08-21 18:53:58,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15685 states and 30062 transitions. [2021-08-21 18:53:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:58,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:58,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:58,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-21 18:53:58,695 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash -959517104, now seen corresponding path program 1 times [2021-08-21 18:53:58,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:58,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513880163] [2021-08-21 18:53:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:58,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:58,741 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 18:53:58,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:58,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513880163] [2021-08-21 18:53:58,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513880163] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:53:58,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:53:58,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:53:58,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820371872] [2021-08-21 18:53:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,742 INFO L87 Difference]: Start difference. First operand 15685 states and 30062 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:58,857 INFO L93 Difference]: Finished difference Result 17824 states and 34529 transitions. [2021-08-21 18:53:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:58,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:58,883 INFO L225 Difference]: With dead ends: 17824 [2021-08-21 18:53:58,883 INFO L226 Difference]: Without dead ends: 17815 [2021-08-21 18:53:58,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17815 states. [2021-08-21 18:53:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17815 to 15713. [2021-08-21 18:53:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15713 states, 15712 states have (on average 1.9211430753564154) internal successors, (30185), 15712 states have internal predecessors, (30185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15713 states to 15713 states and 30185 transitions. [2021-08-21 18:53:59,076 INFO L78 Accepts]: Start accepts. Automaton has 15713 states and 30185 transitions. Word has length 35 [2021-08-21 18:53:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:59,076 INFO L470 AbstractCegarLoop]: Abstraction has 15713 states and 30185 transitions. [2021-08-21 18:53:59,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:53:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15713 states and 30185 transitions. [2021-08-21 18:53:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:53:59,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:59,096 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:59,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-21 18:53:59,096 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:53:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1992972796, now seen corresponding path program 2 times [2021-08-21 18:53:59,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:59,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725387333] [2021-08-21 18:53:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:59,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:59,143 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 18:53:59,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:59,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725387333] [2021-08-21 18:53:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725387333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:59,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398948658] [2021-08-21 18:53:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:59,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:59,144 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 18:53:59,145 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 18:53:59,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:59,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:00,103 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 18:54:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398948658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:00,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:00,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461325988] [2021-08-21 18:54:00,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:00,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:00,104 INFO L87 Difference]: Start difference. First operand 15713 states and 30185 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:00,224 INFO L93 Difference]: Finished difference Result 17599 states and 34079 transitions. [2021-08-21 18:54:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:00,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:00,250 INFO L225 Difference]: With dead ends: 17599 [2021-08-21 18:54:00,250 INFO L226 Difference]: Without dead ends: 17590 [2021-08-21 18:54:00,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17590 states. [2021-08-21 18:54:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17590 to 15731. [2021-08-21 18:54:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15731 states, 15730 states have (on average 1.9235219326128417) internal successors, (30257), 15730 states have internal predecessors, (30257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15731 states to 15731 states and 30257 transitions. [2021-08-21 18:54:00,453 INFO L78 Accepts]: Start accepts. Automaton has 15731 states and 30257 transitions. Word has length 35 [2021-08-21 18:54:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:00,453 INFO L470 AbstractCegarLoop]: Abstraction has 15731 states and 30257 transitions. [2021-08-21 18:54:00,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15731 states and 30257 transitions. [2021-08-21 18:54:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:00,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:00,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:00,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 18:54:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,675 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2120159360, now seen corresponding path program 2 times [2021-08-21 18:54:00,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:00,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110493920] [2021-08-21 18:54:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:00,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:00,727 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 18:54:00,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:00,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110493920] [2021-08-21 18:54:00,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110493920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337181050] [2021-08-21 18:54:00,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:00,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:00,729 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 18:54:00,729 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 18:54:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:01,711 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 18:54:01,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337181050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:01,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:01,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:01,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976029044] [2021-08-21 18:54:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:01,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:01,712 INFO L87 Difference]: Start difference. First operand 15731 states and 30257 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:01,864 INFO L93 Difference]: Finished difference Result 17508 states and 33873 transitions. [2021-08-21 18:54:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:01,889 INFO L225 Difference]: With dead ends: 17508 [2021-08-21 18:54:01,889 INFO L226 Difference]: Without dead ends: 17499 [2021-08-21 18:54:01,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17499 states. [2021-08-21 18:54:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17499 to 15737. [2021-08-21 18:54:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15737 states, 15736 states have (on average 1.9245678698525674) internal successors, (30285), 15736 states have internal predecessors, (30285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15737 states to 15737 states and 30285 transitions. [2021-08-21 18:54:02,086 INFO L78 Accepts]: Start accepts. Automaton has 15737 states and 30285 transitions. Word has length 35 [2021-08-21 18:54:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:02,086 INFO L470 AbstractCegarLoop]: Abstraction has 15737 states and 30285 transitions. [2021-08-21 18:54:02,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 15737 states and 30285 transitions. [2021-08-21 18:54:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:02,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:02,107 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, 1, 1, 1] [2021-08-21 18:54:02,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:54:02,307 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,SelfDestructingSolverStorable89 [2021-08-21 18:54:02,308 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2047621372, now seen corresponding path program 2 times [2021-08-21 18:54:02,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:02,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621870644] [2021-08-21 18:54:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:02,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:02,357 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 18:54:02,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:02,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621870644] [2021-08-21 18:54:02,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621870644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:02,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452713125] [2021-08-21 18:54:02,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:02,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:02,359 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 18:54:02,359 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 18:54:03,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:03,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:03,345 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 18:54:03,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452713125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:03,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:03,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359194744] [2021-08-21 18:54:03,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:03,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:03,346 INFO L87 Difference]: Start difference. First operand 15737 states and 30285 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:03,457 INFO L93 Difference]: Finished difference Result 17581 states and 33993 transitions. [2021-08-21 18:54:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:03,483 INFO L225 Difference]: With dead ends: 17581 [2021-08-21 18:54:03,483 INFO L226 Difference]: Without dead ends: 17572 [2021-08-21 18:54:03,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17572 states. [2021-08-21 18:54:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17572 to 15728. [2021-08-21 18:54:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15728 states, 15727 states have (on average 1.922362815540154) internal successors, (30233), 15727 states have internal predecessors, (30233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15728 states to 15728 states and 30233 transitions. [2021-08-21 18:54:03,677 INFO L78 Accepts]: Start accepts. Automaton has 15728 states and 30233 transitions. Word has length 35 [2021-08-21 18:54:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:03,678 INFO L470 AbstractCegarLoop]: Abstraction has 15728 states and 30233 transitions. [2021-08-21 18:54:03,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15728 states and 30233 transitions. [2021-08-21 18:54:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:03,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:03,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:03,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 18:54:03,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:03,899 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1886734724, now seen corresponding path program 2 times [2021-08-21 18:54:03,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:03,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763888876] [2021-08-21 18:54:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:03,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:03,945 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 18:54:03,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763888876] [2021-08-21 18:54:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763888876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070859332] [2021-08-21 18:54:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:03,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:03,947 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 18:54:03,948 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 18:54:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:04,967 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 18:54:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070859332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:04,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:04,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519763948] [2021-08-21 18:54:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:04,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:04,968 INFO L87 Difference]: Start difference. First operand 15728 states and 30233 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:05,082 INFO L93 Difference]: Finished difference Result 17524 states and 33832 transitions. [2021-08-21 18:54:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:05,116 INFO L225 Difference]: With dead ends: 17524 [2021-08-21 18:54:05,116 INFO L226 Difference]: Without dead ends: 17515 [2021-08-21 18:54:05,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:54:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17515 states. [2021-08-21 18:54:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17515 to 15734. [2021-08-21 18:54:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15734 states, 15733 states have (on average 1.9232822729295111) internal successors, (30259), 15733 states have internal predecessors, (30259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15734 states to 15734 states and 30259 transitions. [2021-08-21 18:54:05,307 INFO L78 Accepts]: Start accepts. Automaton has 15734 states and 30259 transitions. Word has length 35 [2021-08-21 18:54:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:05,307 INFO L470 AbstractCegarLoop]: Abstraction has 15734 states and 30259 transitions. [2021-08-21 18:54:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15734 states and 30259 transitions. [2021-08-21 18:54:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:05,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:05,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:05,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:54:05,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:05,536 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1996693368, now seen corresponding path program 2 times [2021-08-21 18:54:05,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:05,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390044496] [2021-08-21 18:54:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:05,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:05,585 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 18:54:05,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:05,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390044496] [2021-08-21 18:54:05,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390044496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:05,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122738133] [2021-08-21 18:54:05,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:05,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:05,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:05,586 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 18:54:05,586 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 18:54:06,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:06,646 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 18:54:06,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122738133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:06,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:06,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703965404] [2021-08-21 18:54:06,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:06,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:06,647 INFO L87 Difference]: Start difference. First operand 15734 states and 30259 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:06,786 INFO L93 Difference]: Finished difference Result 17597 states and 33936 transitions. [2021-08-21 18:54:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:06,818 INFO L225 Difference]: With dead ends: 17597 [2021-08-21 18:54:06,818 INFO L226 Difference]: Without dead ends: 17588 [2021-08-21 18:54:06,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17588 states. [2021-08-21 18:54:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17588 to 15719. [2021-08-21 18:54:07,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15719 states, 15718 states have (on average 1.9213004199007506) internal successors, (30199), 15718 states have internal predecessors, (30199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15719 states to 15719 states and 30199 transitions. [2021-08-21 18:54:07,047 INFO L78 Accepts]: Start accepts. Automaton has 15719 states and 30199 transitions. Word has length 35 [2021-08-21 18:54:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:07,047 INFO L470 AbstractCegarLoop]: Abstraction has 15719 states and 30199 transitions. [2021-08-21 18:54:07,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15719 states and 30199 transitions. [2021-08-21 18:54:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:07,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:07,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:07,090 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 18:54:07,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:07,285 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2079260044, now seen corresponding path program 2 times [2021-08-21 18:54:07,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:07,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758868697] [2021-08-21 18:54:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:07,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:07,332 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 18:54:07,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:07,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758868697] [2021-08-21 18:54:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758868697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:07,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691216089] [2021-08-21 18:54:07,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:07,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:07,335 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 18:54:07,335 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 18:54:08,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:08,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:08,407 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 18:54:08,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691216089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:08,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:08,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:08,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684733677] [2021-08-21 18:54:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:08,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:08,408 INFO L87 Difference]: Start difference. First operand 15719 states and 30199 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:08,531 INFO L93 Difference]: Finished difference Result 17549 states and 34024 transitions. [2021-08-21 18:54:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:08,558 INFO L225 Difference]: With dead ends: 17549 [2021-08-21 18:54:08,558 INFO L226 Difference]: Without dead ends: 17540 [2021-08-21 18:54:08,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17540 states. [2021-08-21 18:54:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17540 to 15737. [2021-08-21 18:54:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15737 states, 15736 states have (on average 1.9252033553634977) internal successors, (30295), 15736 states have internal predecessors, (30295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15737 states to 15737 states and 30295 transitions. [2021-08-21 18:54:08,765 INFO L78 Accepts]: Start accepts. Automaton has 15737 states and 30295 transitions. Word has length 35 [2021-08-21 18:54:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:08,765 INFO L470 AbstractCegarLoop]: Abstraction has 15737 states and 30295 transitions. [2021-08-21 18:54:08,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15737 states and 30295 transitions. [2021-08-21 18:54:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:08,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:08,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:08,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 18:54:08,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:08,988 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1392628844, now seen corresponding path program 2 times [2021-08-21 18:54:08,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:08,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104337782] [2021-08-21 18:54:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:08,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:09,040 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 18:54:09,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:09,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104337782] [2021-08-21 18:54:09,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104337782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552525026] [2021-08-21 18:54:09,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:09,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:09,041 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 18:54:09,044 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 18:54:09,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:10,140 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 18:54:10,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552525026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:10,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:10,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:10,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991927109] [2021-08-21 18:54:10,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:10,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:10,141 INFO L87 Difference]: Start difference. First operand 15737 states and 30295 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:10,260 INFO L93 Difference]: Finished difference Result 17458 states and 33789 transitions. [2021-08-21 18:54:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:10,287 INFO L225 Difference]: With dead ends: 17458 [2021-08-21 18:54:10,287 INFO L226 Difference]: Without dead ends: 17449 [2021-08-21 18:54:10,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17449 states. [2021-08-21 18:54:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17449 to 15743. [2021-08-21 18:54:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15743 states, 15742 states have (on average 1.92662939905984) internal successors, (30329), 15742 states have internal predecessors, (30329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15743 states to 15743 states and 30329 transitions. [2021-08-21 18:54:10,490 INFO L78 Accepts]: Start accepts. Automaton has 15743 states and 30329 transitions. Word has length 35 [2021-08-21 18:54:10,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:10,490 INFO L470 AbstractCegarLoop]: Abstraction has 15743 states and 30329 transitions. [2021-08-21 18:54:10,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 15743 states and 30329 transitions. [2021-08-21 18:54:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:10,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:10,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:10,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:54:10,712 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,SelfDestructingSolverStorable94 [2021-08-21 18:54:10,712 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 981089640, now seen corresponding path program 2 times [2021-08-21 18:54:10,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:10,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203759648] [2021-08-21 18:54:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:10,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:10,760 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 18:54:10,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:10,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203759648] [2021-08-21 18:54:10,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203759648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:10,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129516346] [2021-08-21 18:54:10,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:10,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:10,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:10,762 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 18:54:10,763 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 18:54:11,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:11,948 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 18:54:11,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129516346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:11,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:11,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:11,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168473343] [2021-08-21 18:54:11,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:11,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:11,949 INFO L87 Difference]: Start difference. First operand 15743 states and 30329 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:12,059 INFO L93 Difference]: Finished difference Result 17531 states and 33944 transitions. [2021-08-21 18:54:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:12,085 INFO L225 Difference]: With dead ends: 17531 [2021-08-21 18:54:12,085 INFO L226 Difference]: Without dead ends: 17522 [2021-08-21 18:54:12,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17522 states. [2021-08-21 18:54:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17522 to 15731. [2021-08-21 18:54:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15731 states, 15730 states have (on average 1.924284806102988) internal successors, (30269), 15730 states have internal predecessors, (30269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15731 states to 15731 states and 30269 transitions. [2021-08-21 18:54:12,274 INFO L78 Accepts]: Start accepts. Automaton has 15731 states and 30269 transitions. Word has length 35 [2021-08-21 18:54:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:12,274 INFO L470 AbstractCegarLoop]: Abstraction has 15731 states and 30269 transitions. [2021-08-21 18:54:12,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15731 states and 30269 transitions. [2021-08-21 18:54:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:12,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:12,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:12,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 18:54:12,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:12,495 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -860795952, now seen corresponding path program 1 times [2021-08-21 18:54:12,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:12,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464602603] [2021-08-21 18:54:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:12,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:12,565 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 18:54:12,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464602603] [2021-08-21 18:54:12,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464602603] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:12,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:12,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:12,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039759418] [2021-08-21 18:54:12,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:12,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:12,566 INFO L87 Difference]: Start difference. First operand 15731 states and 30269 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:12,669 INFO L93 Difference]: Finished difference Result 17601 states and 33789 transitions. [2021-08-21 18:54:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:12,697 INFO L225 Difference]: With dead ends: 17601 [2021-08-21 18:54:12,698 INFO L226 Difference]: Without dead ends: 17588 [2021-08-21 18:54:12,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17588 states. [2021-08-21 18:54:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17588 to 15740. [2021-08-21 18:54:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15740 states, 15739 states have (on average 1.9250270029862127) internal successors, (30298), 15739 states have internal predecessors, (30298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 30298 transitions. [2021-08-21 18:54:12,904 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 30298 transitions. Word has length 35 [2021-08-21 18:54:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:12,904 INFO L470 AbstractCegarLoop]: Abstraction has 15740 states and 30298 transitions. [2021-08-21 18:54:12,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 30298 transitions. [2021-08-21 18:54:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:12,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:12,925 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, 1, 1, 1] [2021-08-21 18:54:12,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-21 18:54:12,925 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 596351696, now seen corresponding path program 1 times [2021-08-21 18:54:12,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:12,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066023425] [2021-08-21 18:54:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:12,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:12,967 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 18:54:12,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:12,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066023425] [2021-08-21 18:54:12,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066023425] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:12,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:12,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:12,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059369483] [2021-08-21 18:54:12,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:12,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:12,968 INFO L87 Difference]: Start difference. First operand 15740 states and 30298 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:13,089 INFO L93 Difference]: Finished difference Result 17705 states and 34233 transitions. [2021-08-21 18:54:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:13,120 INFO L225 Difference]: With dead ends: 17705 [2021-08-21 18:54:13,120 INFO L226 Difference]: Without dead ends: 17696 [2021-08-21 18:54:13,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17696 states. [2021-08-21 18:54:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17696 to 15749. [2021-08-21 18:54:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15749 states, 15748 states have (on average 1.9263398526797053) internal successors, (30336), 15748 states have internal predecessors, (30336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15749 states to 15749 states and 30336 transitions. [2021-08-21 18:54:13,333 INFO L78 Accepts]: Start accepts. Automaton has 15749 states and 30336 transitions. Word has length 35 [2021-08-21 18:54:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:13,333 INFO L470 AbstractCegarLoop]: Abstraction has 15749 states and 30336 transitions. [2021-08-21 18:54:13,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15749 states and 30336 transitions. [2021-08-21 18:54:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:13,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:13,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:13,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-21 18:54:13,353 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1728891388, now seen corresponding path program 2 times [2021-08-21 18:54:13,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:13,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462132132] [2021-08-21 18:54:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:13,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:13,401 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 18:54:13,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:13,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462132132] [2021-08-21 18:54:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462132132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:13,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292850490] [2021-08-21 18:54:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:13,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:13,402 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 18:54:13,403 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 18:54:14,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:14,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:14,532 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 18:54:14,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292850490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:14,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:14,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:14,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739809747] [2021-08-21 18:54:14,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:14,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:14,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:14,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:14,533 INFO L87 Difference]: Start difference. First operand 15749 states and 30336 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:14,650 INFO L93 Difference]: Finished difference Result 17358 states and 33413 transitions. [2021-08-21 18:54:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:14,676 INFO L225 Difference]: With dead ends: 17358 [2021-08-21 18:54:14,676 INFO L226 Difference]: Without dead ends: 17349 [2021-08-21 18:54:14,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17349 states. [2021-08-21 18:54:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17349 to 15735. [2021-08-21 18:54:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15735 states, 15734 states have (on average 1.924876064573535) internal successors, (30286), 15734 states have internal predecessors, (30286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15735 states to 15735 states and 30286 transitions. [2021-08-21 18:54:14,878 INFO L78 Accepts]: Start accepts. Automaton has 15735 states and 30286 transitions. Word has length 35 [2021-08-21 18:54:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:14,878 INFO L470 AbstractCegarLoop]: Abstraction has 15735 states and 30286 transitions. [2021-08-21 18:54:14,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15735 states and 30286 transitions. [2021-08-21 18:54:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:14,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:14,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:14,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:15,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:15,099 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1735956352, now seen corresponding path program 2 times [2021-08-21 18:54:15,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:15,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031679457] [2021-08-21 18:54:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:15,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:15,185 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 18:54:15,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:15,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031679457] [2021-08-21 18:54:15,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031679457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041468921] [2021-08-21 18:54:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:15,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:15,186 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 18:54:15,187 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 18:54:16,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:16,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:16,348 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 18:54:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041468921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:16,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:16,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:16,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429709218] [2021-08-21 18:54:16,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:16,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,349 INFO L87 Difference]: Start difference. First operand 15735 states and 30286 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,469 INFO L93 Difference]: Finished difference Result 17598 states and 34163 transitions. [2021-08-21 18:54:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,496 INFO L225 Difference]: With dead ends: 17598 [2021-08-21 18:54:16,496 INFO L226 Difference]: Without dead ends: 17589 [2021-08-21 18:54:16,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17589 states. [2021-08-21 18:54:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17589 to 15753. [2021-08-21 18:54:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15753 states, 15752 states have (on average 1.9283900457084815) internal successors, (30376), 15752 states have internal predecessors, (30376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15753 states to 15753 states and 30376 transitions. [2021-08-21 18:54:16,699 INFO L78 Accepts]: Start accepts. Automaton has 15753 states and 30376 transitions. Word has length 35 [2021-08-21 18:54:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,699 INFO L470 AbstractCegarLoop]: Abstraction has 15753 states and 30376 transitions. [2021-08-21 18:54:16,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 15753 states and 30376 transitions. [2021-08-21 18:54:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:16,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 18:54:16,921 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,SelfDestructingSolverStorable99 [2021-08-21 18:54:16,921 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2125047432, now seen corresponding path program 2 times [2021-08-21 18:54:16,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430543774] [2021-08-21 18:54:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,968 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 18:54:16,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430543774] [2021-08-21 18:54:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430543774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:16,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271608659] [2021-08-21 18:54:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:16,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:16,970 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 18:54:16,971 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 18:54:17,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:17,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:17,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:18,134 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 18:54:18,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271608659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:18,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:18,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472127361] [2021-08-21 18:54:18,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:18,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:18,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:18,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:18,135 INFO L87 Difference]: Start difference. First operand 15753 states and 30376 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:18,250 INFO L93 Difference]: Finished difference Result 17507 states and 33922 transitions. [2021-08-21 18:54:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:18,275 INFO L225 Difference]: With dead ends: 17507 [2021-08-21 18:54:18,275 INFO L226 Difference]: Without dead ends: 17498 [2021-08-21 18:54:18,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17498 states. [2021-08-21 18:54:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17498 to 15759. [2021-08-21 18:54:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15759 states, 15758 states have (on average 1.9296865084401573) internal successors, (30408), 15758 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 30408 transitions. [2021-08-21 18:54:18,482 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 30408 transitions. Word has length 35 [2021-08-21 18:54:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:18,482 INFO L470 AbstractCegarLoop]: Abstraction has 15759 states and 30408 transitions. [2021-08-21 18:54:18,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 30408 transitions. [2021-08-21 18:54:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:18,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:18,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:18,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 18:54:18,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 18:54:18,705 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 172109324, now seen corresponding path program 2 times [2021-08-21 18:54:18,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:18,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076147182] [2021-08-21 18:54:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:18,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:18,750 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 18:54:18,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:18,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076147182] [2021-08-21 18:54:18,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076147182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335473161] [2021-08-21 18:54:18,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:18,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:18,751 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 18:54:18,752 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 18:54:19,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:19,944 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 18:54:19,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335473161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:19,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:19,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:19,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588397818] [2021-08-21 18:54:19,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:19,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:19,945 INFO L87 Difference]: Start difference. First operand 15759 states and 30408 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:20,060 INFO L93 Difference]: Finished difference Result 17580 states and 34066 transitions. [2021-08-21 18:54:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:20,085 INFO L225 Difference]: With dead ends: 17580 [2021-08-21 18:54:20,085 INFO L226 Difference]: Without dead ends: 17571 [2021-08-21 18:54:20,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:54:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17571 states. [2021-08-21 18:54:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17571 to 15750. [2021-08-21 18:54:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15750 states, 15749 states have (on average 1.9271064829512985) internal successors, (30350), 15749 states have internal predecessors, (30350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15750 states to 15750 states and 30350 transitions. [2021-08-21 18:54:20,282 INFO L78 Accepts]: Start accepts. Automaton has 15750 states and 30350 transitions. Word has length 35 [2021-08-21 18:54:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:20,282 INFO L470 AbstractCegarLoop]: Abstraction has 15750 states and 30350 transitions. [2021-08-21 18:54:20,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15750 states and 30350 transitions. [2021-08-21 18:54:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:20,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:20,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:20,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:54:20,504 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,SelfDestructingSolverStorable101 [2021-08-21 18:54:20,504 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1901754884, now seen corresponding path program 1 times [2021-08-21 18:54:20,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:20,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88195164] [2021-08-21 18:54:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:20,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:20,574 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 18:54:20,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:20,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88195164] [2021-08-21 18:54:20,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88195164] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:20,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:20,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:20,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847196299] [2021-08-21 18:54:20,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:20,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:20,575 INFO L87 Difference]: Start difference. First operand 15750 states and 30350 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:20,741 INFO L93 Difference]: Finished difference Result 17811 states and 34336 transitions. [2021-08-21 18:54:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:20,770 INFO L225 Difference]: With dead ends: 17811 [2021-08-21 18:54:20,770 INFO L226 Difference]: Without dead ends: 17798 [2021-08-21 18:54:20,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17798 states. [2021-08-21 18:54:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17798 to 15749. [2021-08-21 18:54:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15749 states, 15748 states have (on average 1.9271653543307086) internal successors, (30349), 15748 states have internal predecessors, (30349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15749 states to 15749 states and 30349 transitions. [2021-08-21 18:54:20,963 INFO L78 Accepts]: Start accepts. Automaton has 15749 states and 30349 transitions. Word has length 35 [2021-08-21 18:54:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:20,964 INFO L470 AbstractCegarLoop]: Abstraction has 15749 states and 30349 transitions. [2021-08-21 18:54:20,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15749 states and 30349 transitions. [2021-08-21 18:54:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:20,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:20,984 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, 1, 1, 1] [2021-08-21 18:54:20,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-21 18:54:20,984 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -169459588, now seen corresponding path program 2 times [2021-08-21 18:54:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:20,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738241348] [2021-08-21 18:54:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:20,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:21,033 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 18:54:21,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:21,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738241348] [2021-08-21 18:54:21,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738241348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:21,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052010789] [2021-08-21 18:54:21,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:21,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:21,037 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 18:54:21,039 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 18:54:22,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:22,329 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 18:54:22,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052010789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:22,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:22,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:22,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206213998] [2021-08-21 18:54:22,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:22,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:22,330 INFO L87 Difference]: Start difference. First operand 15749 states and 30349 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:22,450 INFO L93 Difference]: Finished difference Result 17625 states and 34226 transitions. [2021-08-21 18:54:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:22,476 INFO L225 Difference]: With dead ends: 17625 [2021-08-21 18:54:22,476 INFO L226 Difference]: Without dead ends: 17616 [2021-08-21 18:54:22,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17616 states. [2021-08-21 18:54:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17616 to 15767. [2021-08-21 18:54:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15767 states, 15766 states have (on average 1.9302930356463275) internal successors, (30433), 15766 states have internal predecessors, (30433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15767 states to 15767 states and 30433 transitions. [2021-08-21 18:54:22,672 INFO L78 Accepts]: Start accepts. Automaton has 15767 states and 30433 transitions. Word has length 35 [2021-08-21 18:54:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:22,673 INFO L470 AbstractCegarLoop]: Abstraction has 15767 states and 30433 transitions. [2021-08-21 18:54:22,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15767 states and 30433 transitions. [2021-08-21 18:54:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:22,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:22,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:22,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:54:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:22,893 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash -786646920, now seen corresponding path program 2 times [2021-08-21 18:54:22,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:22,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40169525] [2021-08-21 18:54:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:22,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:22,941 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 18:54:22,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:22,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40169525] [2021-08-21 18:54:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40169525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:22,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221231685] [2021-08-21 18:54:22,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:22,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:22,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:22,943 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 18:54:22,944 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 18:54:24,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:24,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:24,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:24,179 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 18:54:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221231685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:24,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:24,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:24,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959552081] [2021-08-21 18:54:24,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:24,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:24,180 INFO L87 Difference]: Start difference. First operand 15767 states and 30433 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:24,297 INFO L93 Difference]: Finished difference Result 17676 states and 34359 transitions. [2021-08-21 18:54:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:24,322 INFO L225 Difference]: With dead ends: 17676 [2021-08-21 18:54:24,322 INFO L226 Difference]: Without dead ends: 17667 [2021-08-21 18:54:24,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17667 states. [2021-08-21 18:54:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17667 to 15791. [2021-08-21 18:54:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15791 states, 15790 states have (on average 1.9333122229259025) internal successors, (30527), 15790 states have internal predecessors, (30527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15791 states to 15791 states and 30527 transitions. [2021-08-21 18:54:24,523 INFO L78 Accepts]: Start accepts. Automaton has 15791 states and 30527 transitions. Word has length 35 [2021-08-21 18:54:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:24,523 INFO L470 AbstractCegarLoop]: Abstraction has 15791 states and 30527 transitions. [2021-08-21 18:54:24,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15791 states and 30527 transitions. [2021-08-21 18:54:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:24,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:24,543 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, 1, 1, 1] [2021-08-21 18:54:24,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 18:54:24,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:24,744 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1403834252, now seen corresponding path program 2 times [2021-08-21 18:54:24,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:24,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930140695] [2021-08-21 18:54:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:24,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:24,793 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 18:54:24,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:24,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930140695] [2021-08-21 18:54:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930140695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:24,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232288748] [2021-08-21 18:54:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:24,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:24,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:24,794 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 18:54:24,804 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 18:54:25,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:26,090 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 18:54:26,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232288748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:26,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:26,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:26,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682676400] [2021-08-21 18:54:26,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:26,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:26,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:26,091 INFO L87 Difference]: Start difference. First operand 15791 states and 30527 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:26,206 INFO L93 Difference]: Finished difference Result 17560 states and 34089 transitions. [2021-08-21 18:54:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:26,231 INFO L225 Difference]: With dead ends: 17560 [2021-08-21 18:54:26,232 INFO L226 Difference]: Without dead ends: 17551 [2021-08-21 18:54:26,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17551 states. [2021-08-21 18:54:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17551 to 15797. [2021-08-21 18:54:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15797 states, 15796 states have (on average 1.9344770828057736) internal successors, (30557), 15796 states have internal predecessors, (30557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15797 states to 15797 states and 30557 transitions. [2021-08-21 18:54:26,436 INFO L78 Accepts]: Start accepts. Automaton has 15797 states and 30557 transitions. Word has length 35 [2021-08-21 18:54:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:26,436 INFO L470 AbstractCegarLoop]: Abstraction has 15797 states and 30557 transitions. [2021-08-21 18:54:26,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 15797 states and 30557 transitions. [2021-08-21 18:54:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:26,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:26,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:26,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:54:26,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 18:54:26,657 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2021021584, now seen corresponding path program 2 times [2021-08-21 18:54:26,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:26,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112012845] [2021-08-21 18:54:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:26,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:26,711 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 18:54:26,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:26,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112012845] [2021-08-21 18:54:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112012845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:26,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289914058] [2021-08-21 18:54:26,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:26,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:26,712 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 18:54:26,712 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 18:54:27,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:27,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:27,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:27,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:28,019 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 18:54:28,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289914058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:28,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:28,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:28,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071784163] [2021-08-21 18:54:28,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:28,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:28,020 INFO L87 Difference]: Start difference. First operand 15797 states and 30557 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:28,129 INFO L93 Difference]: Finished difference Result 17633 states and 34222 transitions. [2021-08-21 18:54:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:28,155 INFO L225 Difference]: With dead ends: 17633 [2021-08-21 18:54:28,155 INFO L226 Difference]: Without dead ends: 17624 [2021-08-21 18:54:28,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2021-08-21 18:54:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 15772. [2021-08-21 18:54:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15772 states, 15771 states have (on average 1.9291103924925497) internal successors, (30424), 15771 states have internal predecessors, (30424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15772 states to 15772 states and 30424 transitions. [2021-08-21 18:54:28,345 INFO L78 Accepts]: Start accepts. Automaton has 15772 states and 30424 transitions. Word has length 35 [2021-08-21 18:54:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:28,345 INFO L470 AbstractCegarLoop]: Abstraction has 15772 states and 30424 transitions. [2021-08-21 18:54:28,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15772 states and 30424 transitions. [2021-08-21 18:54:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:28,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:28,366 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 18:54:28,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:54:28,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 18:54:28,567 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1667298936, now seen corresponding path program 3 times [2021-08-21 18:54:28,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:28,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145142610] [2021-08-21 18:54:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:28,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:28,616 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 18:54:28,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:28,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145142610] [2021-08-21 18:54:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145142610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:28,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542436615] [2021-08-21 18:54:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:28,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:28,617 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 18:54:28,618 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 18:54:29,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:29,918 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 18:54:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542436615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:29,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124665616] [2021-08-21 18:54:29,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:29,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:29,919 INFO L87 Difference]: Start difference. First operand 15772 states and 30424 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:30,044 INFO L93 Difference]: Finished difference Result 17618 states and 34294 transitions. [2021-08-21 18:54:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:30,070 INFO L225 Difference]: With dead ends: 17618 [2021-08-21 18:54:30,070 INFO L226 Difference]: Without dead ends: 17609 [2021-08-21 18:54:30,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17609 states. [2021-08-21 18:54:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17609 to 15794. [2021-08-21 18:54:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15794 states, 15793 states have (on average 1.9340847210789591) internal successors, (30545), 15793 states have internal predecessors, (30545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15794 states to 15794 states and 30545 transitions. [2021-08-21 18:54:30,311 INFO L78 Accepts]: Start accepts. Automaton has 15794 states and 30545 transitions. Word has length 35 [2021-08-21 18:54:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:30,311 INFO L470 AbstractCegarLoop]: Abstraction has 15794 states and 30545 transitions. [2021-08-21 18:54:30,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 15794 states and 30545 transitions. [2021-08-21 18:54:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:30,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:30,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:30,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:54:30,532 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,SelfDestructingSolverStorable107 [2021-08-21 18:54:30,532 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 482645560, now seen corresponding path program 3 times [2021-08-21 18:54:30,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435257103] [2021-08-21 18:54:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,579 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 18:54:30,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435257103] [2021-08-21 18:54:30,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435257103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901509587] [2021-08-21 18:54:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:30,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:30,580 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 18:54:30,581 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 18:54:31,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:31,917 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 18:54:31,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901509587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:31,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:31,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:31,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178258006] [2021-08-21 18:54:31,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:31,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:31,918 INFO L87 Difference]: Start difference. First operand 15794 states and 30545 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:32,044 INFO L93 Difference]: Finished difference Result 17715 states and 34702 transitions. [2021-08-21 18:54:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:32,070 INFO L225 Difference]: With dead ends: 17715 [2021-08-21 18:54:32,070 INFO L226 Difference]: Without dead ends: 17706 [2021-08-21 18:54:32,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17706 states. [2021-08-21 18:54:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17706 to 15878. [2021-08-21 18:54:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15878 states, 15877 states have (on average 1.9503684575171631) internal successors, (30966), 15877 states have internal predecessors, (30966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15878 states to 15878 states and 30966 transitions. [2021-08-21 18:54:32,275 INFO L78 Accepts]: Start accepts. Automaton has 15878 states and 30966 transitions. Word has length 35 [2021-08-21 18:54:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:32,275 INFO L470 AbstractCegarLoop]: Abstraction has 15878 states and 30966 transitions. [2021-08-21 18:54:32,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15878 states and 30966 transitions. [2021-08-21 18:54:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:32,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:32,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:32,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:32,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:32,496 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1676001092, now seen corresponding path program 3 times [2021-08-21 18:54:32,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:32,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548502520] [2021-08-21 18:54:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:32,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:32,545 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 18:54:32,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:32,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548502520] [2021-08-21 18:54:32,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548502520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:32,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45372112] [2021-08-21 18:54:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:32,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:32,546 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 18:54:32,547 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 18:54:33,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:33,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:33,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:33,912 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 18:54:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45372112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:33,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:33,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:33,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529519450] [2021-08-21 18:54:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:33,913 INFO L87 Difference]: Start difference. First operand 15878 states and 30966 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:34,085 INFO L93 Difference]: Finished difference Result 17780 states and 34870 transitions. [2021-08-21 18:54:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,110 INFO L225 Difference]: With dead ends: 17780 [2021-08-21 18:54:34,110 INFO L226 Difference]: Without dead ends: 17771 [2021-08-21 18:54:34,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17771 states. [2021-08-21 18:54:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17771 to 15918. [2021-08-21 18:54:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15918 states, 15917 states have (on average 1.9564616447823082) internal successors, (31141), 15917 states have internal predecessors, (31141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15918 states to 15918 states and 31141 transitions. [2021-08-21 18:54:34,310 INFO L78 Accepts]: Start accepts. Automaton has 15918 states and 31141 transitions. Word has length 35 [2021-08-21 18:54:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,311 INFO L470 AbstractCegarLoop]: Abstraction has 15918 states and 31141 transitions. [2021-08-21 18:54:34,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 15918 states and 31141 transitions. [2021-08-21 18:54:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:34,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,331 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, 1, 1, 1] [2021-08-21 18:54:34,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 18:54:34,531 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,SelfDestructingSolverStorable109 [2021-08-21 18:54:34,532 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:34,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1279875656, now seen corresponding path program 3 times [2021-08-21 18:54:34,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:34,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113798123] [2021-08-21 18:54:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:34,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:34,588 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 18:54:34,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:34,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113798123] [2021-08-21 18:54:34,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113798123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197452558] [2021-08-21 18:54:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:34,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:34,590 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 18:54:34,591 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 18:54:35,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:35,984 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 18:54:35,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197452558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:35,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:35,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438614120] [2021-08-21 18:54:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:35,985 INFO L87 Difference]: Start difference. First operand 15918 states and 31141 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:36,111 INFO L93 Difference]: Finished difference Result 17791 states and 35053 transitions. [2021-08-21 18:54:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:36,138 INFO L225 Difference]: With dead ends: 17791 [2021-08-21 18:54:36,138 INFO L226 Difference]: Without dead ends: 17782 [2021-08-21 18:54:36,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17782 states. [2021-08-21 18:54:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17782 to 15950. [2021-08-21 18:54:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15949 states have (on average 1.9628816853721236) internal successors, (31306), 15949 states have internal predecessors, (31306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 31306 transitions. [2021-08-21 18:54:36,349 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 31306 transitions. Word has length 35 [2021-08-21 18:54:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:36,349 INFO L470 AbstractCegarLoop]: Abstraction has 15950 states and 31306 transitions. [2021-08-21 18:54:36,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 31306 transitions. [2021-08-21 18:54:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:36,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:36,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:36,389 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 18:54:36,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:36,571 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash -913487560, now seen corresponding path program 3 times [2021-08-21 18:54:36,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:36,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769940061] [2021-08-21 18:54:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:36,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:36,619 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 18:54:36,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:36,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769940061] [2021-08-21 18:54:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769940061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:36,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804621191] [2021-08-21 18:54:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:36,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:36,621 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 18:54:36,622 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 18:54:37,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:38,060 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 18:54:38,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804621191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:38,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:38,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:38,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003123013] [2021-08-21 18:54:38,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:38,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:38,061 INFO L87 Difference]: Start difference. First operand 15950 states and 31306 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:38,185 INFO L93 Difference]: Finished difference Result 17679 states and 34772 transitions. [2021-08-21 18:54:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:38,211 INFO L225 Difference]: With dead ends: 17679 [2021-08-21 18:54:38,212 INFO L226 Difference]: Without dead ends: 17670 [2021-08-21 18:54:38,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17670 states. [2021-08-21 18:54:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17670 to 15963. [2021-08-21 18:54:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15963 states, 15962 states have (on average 1.9652299210625235) internal successors, (31369), 15962 states have internal predecessors, (31369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15963 states to 15963 states and 31369 transitions. [2021-08-21 18:54:38,417 INFO L78 Accepts]: Start accepts. Automaton has 15963 states and 31369 transitions. Word has length 35 [2021-08-21 18:54:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:38,417 INFO L470 AbstractCegarLoop]: Abstraction has 15963 states and 31369 transitions. [2021-08-21 18:54:38,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 15963 states and 31369 transitions. [2021-08-21 18:54:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:38,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:38,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:38,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:54:38,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:54:38,647 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 731434892, now seen corresponding path program 3 times [2021-08-21 18:54:38,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:38,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061189935] [2021-08-21 18:54:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:38,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:38,699 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 18:54:38,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:38,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061189935] [2021-08-21 18:54:38,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061189935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:38,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4683330] [2021-08-21 18:54:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:38,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:38,700 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 18:54:38,702 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 18:54:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:40,177 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 18:54:40,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4683330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:40,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:40,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:40,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822818361] [2021-08-21 18:54:40,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:40,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:40,178 INFO L87 Difference]: Start difference. First operand 15963 states and 31369 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:40,292 INFO L93 Difference]: Finished difference Result 17800 states and 34897 transitions. [2021-08-21 18:54:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:40,318 INFO L225 Difference]: With dead ends: 17800 [2021-08-21 18:54:40,318 INFO L226 Difference]: Without dead ends: 17787 [2021-08-21 18:54:40,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17787 states. [2021-08-21 18:54:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17787 to 15982. [2021-08-21 18:54:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15982 states, 15981 states have (on average 1.9680245291283398) internal successors, (31451), 15981 states have internal predecessors, (31451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15982 states to 15982 states and 31451 transitions. [2021-08-21 18:54:40,513 INFO L78 Accepts]: Start accepts. Automaton has 15982 states and 31451 transitions. Word has length 35 [2021-08-21 18:54:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:40,513 INFO L470 AbstractCegarLoop]: Abstraction has 15982 states and 31451 transitions. [2021-08-21 18:54:40,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 15982 states and 31451 transitions. [2021-08-21 18:54:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:40,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:40,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:40,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 18:54:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:40,734 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2106384756, now seen corresponding path program 3 times [2021-08-21 18:54:40,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:40,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244762763] [2021-08-21 18:54:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:40,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:40,781 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 18:54:40,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:40,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244762763] [2021-08-21 18:54:40,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244762763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:40,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979885616] [2021-08-21 18:54:40,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:40,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:40,782 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 18:54:40,782 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 18:54:42,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:42,242 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 18:54:42,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979885616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:42,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:42,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:42,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616462469] [2021-08-21 18:54:42,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:42,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:42,243 INFO L87 Difference]: Start difference. First operand 15982 states and 31451 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:42,371 INFO L93 Difference]: Finished difference Result 17935 states and 35569 transitions. [2021-08-21 18:54:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:42,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:42,400 INFO L225 Difference]: With dead ends: 17935 [2021-08-21 18:54:42,400 INFO L226 Difference]: Without dead ends: 17926 [2021-08-21 18:54:42,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17926 states. [2021-08-21 18:54:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17926 to 16037. [2021-08-21 18:54:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16037 states, 16036 states have (on average 1.975492641556498) internal successors, (31679), 16036 states have internal predecessors, (31679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16037 states to 16037 states and 31679 transitions. [2021-08-21 18:54:42,610 INFO L78 Accepts]: Start accepts. Automaton has 16037 states and 31679 transitions. Word has length 35 [2021-08-21 18:54:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 16037 states and 31679 transitions. [2021-08-21 18:54:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 16037 states and 31679 transitions. [2021-08-21 18:54:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:42,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:42,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:42,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 18:54:42,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:54:42,832 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1093836400, now seen corresponding path program 4 times [2021-08-21 18:54:42,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:42,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342820954] [2021-08-21 18:54:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:42,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:42,879 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 18:54:42,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:42,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342820954] [2021-08-21 18:54:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342820954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:42,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085001352] [2021-08-21 18:54:42,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:42,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:42,893 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 18:54:42,897 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 18:54:44,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:44,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:44,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:44,385 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 18:54:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085001352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:44,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:44,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:44,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220034571] [2021-08-21 18:54:44,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:44,386 INFO L87 Difference]: Start difference. First operand 16037 states and 31679 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:44,510 INFO L93 Difference]: Finished difference Result 17892 states and 35580 transitions. [2021-08-21 18:54:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:44,587 INFO L225 Difference]: With dead ends: 17892 [2021-08-21 18:54:44,587 INFO L226 Difference]: Without dead ends: 17883 [2021-08-21 18:54:44,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17883 states. [2021-08-21 18:54:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17883 to 16061. [2021-08-21 18:54:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16061 states, 16060 states have (on average 1.9792652552926526) internal successors, (31787), 16060 states have internal predecessors, (31787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16061 states to 16061 states and 31787 transitions. [2021-08-21 18:54:44,798 INFO L78 Accepts]: Start accepts. Automaton has 16061 states and 31787 transitions. Word has length 35 [2021-08-21 18:54:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:44,798 INFO L470 AbstractCegarLoop]: Abstraction has 16061 states and 31787 transitions. [2021-08-21 18:54:44,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16061 states and 31787 transitions. [2021-08-21 18:54:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:44,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:44,819 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:44,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 18:54:45,020 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,SelfDestructingSolverStorable114 [2021-08-21 18:54:45,020 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash -847228804, now seen corresponding path program 4 times [2021-08-21 18:54:45,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:45,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612260608] [2021-08-21 18:54:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:45,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:45,069 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 18:54:45,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612260608] [2021-08-21 18:54:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612260608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997806066] [2021-08-21 18:54:45,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:45,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:45,071 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 18:54:45,071 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 18:54:46,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:46,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:46,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:46,562 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 18:54:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997806066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:46,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:46,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920363343] [2021-08-21 18:54:46,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:46,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:46,563 INFO L87 Difference]: Start difference. First operand 16061 states and 31787 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:46,701 INFO L93 Difference]: Finished difference Result 17900 states and 35665 transitions. [2021-08-21 18:54:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:46,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:46,728 INFO L225 Difference]: With dead ends: 17900 [2021-08-21 18:54:46,728 INFO L226 Difference]: Without dead ends: 17891 [2021-08-21 18:54:46,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17891 states. [2021-08-21 18:54:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17891 to 16081. [2021-08-21 18:54:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16081 states, 16080 states have (on average 1.9830223880597015) internal successors, (31887), 16080 states have internal predecessors, (31887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16081 states to 16081 states and 31887 transitions. [2021-08-21 18:54:46,930 INFO L78 Accepts]: Start accepts. Automaton has 16081 states and 31887 transitions. Word has length 35 [2021-08-21 18:54:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:46,930 INFO L470 AbstractCegarLoop]: Abstraction has 16081 states and 31887 transitions. [2021-08-21 18:54:46,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 16081 states and 31887 transitions. [2021-08-21 18:54:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:46,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:46,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:46,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 18:54:47,151 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,SelfDestructingSolverStorable115 [2021-08-21 18:54:47,151 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:47,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1820237188, now seen corresponding path program 1 times [2021-08-21 18:54:47,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:47,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537545286] [2021-08-21 18:54:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:47,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:47,198 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 18:54:47,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:47,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537545286] [2021-08-21 18:54:47,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537545286] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:47,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:47,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:47,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774405638] [2021-08-21 18:54:47,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:47,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:47,199 INFO L87 Difference]: Start difference. First operand 16081 states and 31887 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:47,313 INFO L93 Difference]: Finished difference Result 18637 states and 37809 transitions. [2021-08-21 18:54:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:47,340 INFO L225 Difference]: With dead ends: 18637 [2021-08-21 18:54:47,341 INFO L226 Difference]: Without dead ends: 18628 [2021-08-21 18:54:47,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18628 states. [2021-08-21 18:54:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18628 to 16313. [2021-08-21 18:54:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16313 states, 16312 states have (on average 2.0138548307994113) internal successors, (32850), 16312 states have internal predecessors, (32850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16313 states to 16313 states and 32850 transitions. [2021-08-21 18:54:47,544 INFO L78 Accepts]: Start accepts. Automaton has 16313 states and 32850 transitions. Word has length 35 [2021-08-21 18:54:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:47,545 INFO L470 AbstractCegarLoop]: Abstraction has 16313 states and 32850 transitions. [2021-08-21 18:54:47,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 16313 states and 32850 transitions. [2021-08-21 18:54:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:47,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:47,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:47,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-21 18:54:47,567 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1135639560, now seen corresponding path program 1 times [2021-08-21 18:54:47,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:47,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964228109] [2021-08-21 18:54:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:47,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:47,616 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 18:54:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964228109] [2021-08-21 18:54:47,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964228109] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:47,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:47,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:47,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871618130] [2021-08-21 18:54:47,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:47,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:47,617 INFO L87 Difference]: Start difference. First operand 16313 states and 32850 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:47,735 INFO L93 Difference]: Finished difference Result 18725 states and 38294 transitions. [2021-08-21 18:54:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:47,762 INFO L225 Difference]: With dead ends: 18725 [2021-08-21 18:54:47,763 INFO L226 Difference]: Without dead ends: 18716 [2021-08-21 18:54:47,763 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 18:54:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18716 states. [2021-08-21 18:54:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18716 to 16439. [2021-08-21 18:54:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16439 states, 16438 states have (on average 2.0343107433994403) internal successors, (33440), 16438 states have internal predecessors, (33440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 33440 transitions. [2021-08-21 18:54:47,963 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 33440 transitions. Word has length 35 [2021-08-21 18:54:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:47,963 INFO L470 AbstractCegarLoop]: Abstraction has 16439 states and 33440 transitions. [2021-08-21 18:54:47,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 33440 transitions. [2021-08-21 18:54:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:47,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:47,984 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, 1, 1, 1] [2021-08-21 18:54:47,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-21 18:54:47,985 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -769251464, now seen corresponding path program 1 times [2021-08-21 18:54:47,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:47,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046676633] [2021-08-21 18:54:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:47,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:48,032 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 18:54:48,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:48,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046676633] [2021-08-21 18:54:48,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046676633] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:48,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:48,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:48,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387595987] [2021-08-21 18:54:48,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:48,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:48,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:48,033 INFO L87 Difference]: Start difference. First operand 16439 states and 33440 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:48,146 INFO L93 Difference]: Finished difference Result 18659 states and 38139 transitions. [2021-08-21 18:54:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:48,174 INFO L225 Difference]: With dead ends: 18659 [2021-08-21 18:54:48,175 INFO L226 Difference]: Without dead ends: 18650 [2021-08-21 18:54:48,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18650 states. [2021-08-21 18:54:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18650 to 16490. [2021-08-21 18:54:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16490 states, 16489 states have (on average 2.0409970283219114) internal successors, (33654), 16489 states have internal predecessors, (33654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16490 states to 16490 states and 33654 transitions. [2021-08-21 18:54:48,377 INFO L78 Accepts]: Start accepts. Automaton has 16490 states and 33654 transitions. Word has length 35 [2021-08-21 18:54:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 16490 states and 33654 transitions. [2021-08-21 18:54:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16490 states and 33654 transitions. [2021-08-21 18:54:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:48,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:48,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:48,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-21 18:54:48,398 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash 875670988, now seen corresponding path program 1 times [2021-08-21 18:54:48,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:48,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782400937] [2021-08-21 18:54:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:48,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:48,444 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 18:54:48,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:48,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782400937] [2021-08-21 18:54:48,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782400937] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:48,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:48,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:48,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700339747] [2021-08-21 18:54:48,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:48,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:48,445 INFO L87 Difference]: Start difference. First operand 16490 states and 33654 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:48,605 INFO L93 Difference]: Finished difference Result 18837 states and 38480 transitions. [2021-08-21 18:54:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:48,631 INFO L225 Difference]: With dead ends: 18837 [2021-08-21 18:54:48,631 INFO L226 Difference]: Without dead ends: 18824 [2021-08-21 18:54:48,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18824 states. [2021-08-21 18:54:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18824 to 16570. [2021-08-21 18:54:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16570 states, 16569 states have (on average 2.0478604623091314) internal successors, (33931), 16569 states have internal predecessors, (33931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16570 states to 16570 states and 33931 transitions. [2021-08-21 18:54:48,829 INFO L78 Accepts]: Start accepts. Automaton has 16570 states and 33931 transitions. Word has length 35 [2021-08-21 18:54:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:48,829 INFO L470 AbstractCegarLoop]: Abstraction has 16570 states and 33931 transitions. [2021-08-21 18:54:48,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 16570 states and 33931 transitions. [2021-08-21 18:54:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:48,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:48,851 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 18:54:48,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-21 18:54:48,851 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1962148660, now seen corresponding path program 1 times [2021-08-21 18:54:48,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:48,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655787685] [2021-08-21 18:54:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:48,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:48,904 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 18:54:48,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:48,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655787685] [2021-08-21 18:54:48,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655787685] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:48,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:48,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957226937] [2021-08-21 18:54:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:48,905 INFO L87 Difference]: Start difference. First operand 16570 states and 33931 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:49,026 INFO L93 Difference]: Finished difference Result 19097 states and 39659 transitions. [2021-08-21 18:54:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:49,054 INFO L225 Difference]: With dead ends: 19097 [2021-08-21 18:54:49,054 INFO L226 Difference]: Without dead ends: 19088 [2021-08-21 18:54:49,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19088 states. [2021-08-21 18:54:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19088 to 16756. [2021-08-21 18:54:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16756 states, 16755 states have (on average 2.069233064756789) internal successors, (34670), 16755 states have internal predecessors, (34670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16756 states to 16756 states and 34670 transitions. [2021-08-21 18:54:49,267 INFO L78 Accepts]: Start accepts. Automaton has 16756 states and 34670 transitions. Word has length 35 [2021-08-21 18:54:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:49,267 INFO L470 AbstractCegarLoop]: Abstraction has 16756 states and 34670 transitions. [2021-08-21 18:54:49,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16756 states and 34670 transitions. [2021-08-21 18:54:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:49,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:49,289 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:49,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-21 18:54:49,289 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 76486904, now seen corresponding path program 2 times [2021-08-21 18:54:49,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:49,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644445091] [2021-08-21 18:54:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:49,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:49,343 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 18:54:49,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:49,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644445091] [2021-08-21 18:54:49,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644445091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:49,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528705272] [2021-08-21 18:54:49,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:49,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:49,344 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 18:54:49,345 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 18:54:50,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:50,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:50,871 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 18:54:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528705272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:50,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:50,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:50,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545016833] [2021-08-21 18:54:50,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:50,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:50,872 INFO L87 Difference]: Start difference. First operand 16756 states and 34670 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:51,064 INFO L93 Difference]: Finished difference Result 18938 states and 39486 transitions. [2021-08-21 18:54:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:51,093 INFO L225 Difference]: With dead ends: 18938 [2021-08-21 18:54:51,093 INFO L226 Difference]: Without dead ends: 18929 [2021-08-21 18:54:51,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-08-21 18:54:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 16847. [2021-08-21 18:54:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16847 states, 16846 states have (on average 2.0815623886976136) internal successors, (35066), 16846 states have internal predecessors, (35066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 35066 transitions. [2021-08-21 18:54:51,318 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 35066 transitions. Word has length 35 [2021-08-21 18:54:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:51,318 INFO L470 AbstractCegarLoop]: Abstraction has 16847 states and 35066 transitions. [2021-08-21 18:54:51,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 35066 transitions. [2021-08-21 18:54:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:51,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:51,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:51,361 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 18:54:51,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:51,542 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1969825560, now seen corresponding path program 4 times [2021-08-21 18:54:51,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:51,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315369799] [2021-08-21 18:54:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:51,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:51,590 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 18:54:51,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315369799] [2021-08-21 18:54:51,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315369799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:51,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967886920] [2021-08-21 18:54:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:51,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:51,591 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 18:54:51,591 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 18:54:52,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:53,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:53,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:53,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:53,201 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 18:54:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967886920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:53,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:53,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:53,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468863369] [2021-08-21 18:54:53,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:53,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:53,202 INFO L87 Difference]: Start difference. First operand 16847 states and 35066 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:53,326 INFO L93 Difference]: Finished difference Result 18804 states and 39248 transitions. [2021-08-21 18:54:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:53,355 INFO L225 Difference]: With dead ends: 18804 [2021-08-21 18:54:53,355 INFO L226 Difference]: Without dead ends: 18795 [2021-08-21 18:54:53,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18795 states. [2021-08-21 18:54:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18795 to 16863. [2021-08-21 18:54:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16863 states, 16862 states have (on average 2.0848060728264737) internal successors, (35154), 16862 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16863 states to 16863 states and 35154 transitions. [2021-08-21 18:54:53,572 INFO L78 Accepts]: Start accepts. Automaton has 16863 states and 35154 transitions. Word has length 35 [2021-08-21 18:54:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:53,572 INFO L470 AbstractCegarLoop]: Abstraction has 16863 states and 35154 transitions. [2021-08-21 18:54:53,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16863 states and 35154 transitions. [2021-08-21 18:54:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:53,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:53,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:53,634 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 18:54:53,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:53,801 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 674705260, now seen corresponding path program 1 times [2021-08-21 18:54:53,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:53,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453188798] [2021-08-21 18:54:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:53,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:53,854 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 18:54:53,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:53,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453188798] [2021-08-21 18:54:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453188798] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:53,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318411599] [2021-08-21 18:54:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:53,855 INFO L87 Difference]: Start difference. First operand 16863 states and 35154 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:53,974 INFO L93 Difference]: Finished difference Result 19332 states and 40603 transitions. [2021-08-21 18:54:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:54,007 INFO L225 Difference]: With dead ends: 19332 [2021-08-21 18:54:54,008 INFO L226 Difference]: Without dead ends: 19323 [2021-08-21 18:54:54,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19323 states. [2021-08-21 18:54:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19323 to 16967. [2021-08-21 18:54:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16967 states, 16966 states have (on average 2.0950135565248145) internal successors, (35544), 16966 states have internal predecessors, (35544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16967 states to 16967 states and 35544 transitions. [2021-08-21 18:54:54,226 INFO L78 Accepts]: Start accepts. Automaton has 16967 states and 35544 transitions. Word has length 35 [2021-08-21 18:54:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:54,226 INFO L470 AbstractCegarLoop]: Abstraction has 16967 states and 35544 transitions. [2021-08-21 18:54:54,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16967 states and 35544 transitions. [2021-08-21 18:54:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:54,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:54,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-21 18:54:54,249 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1041093356, now seen corresponding path program 1 times [2021-08-21 18:54:54,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:54,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960738302] [2021-08-21 18:54:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:54,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,296 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 18:54:54,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960738302] [2021-08-21 18:54:54,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960738302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:54,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:54,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:54,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285077918] [2021-08-21 18:54:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:54,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,297 INFO L87 Difference]: Start difference. First operand 16967 states and 35544 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:54,410 INFO L93 Difference]: Finished difference Result 19258 states and 40380 transitions. [2021-08-21 18:54:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:54,439 INFO L225 Difference]: With dead ends: 19258 [2021-08-21 18:54:54,439 INFO L226 Difference]: Without dead ends: 19249 [2021-08-21 18:54:54,439 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 18:54:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19249 states. [2021-08-21 18:54:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19249 to 17021. [2021-08-21 18:54:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17021 states, 17020 states have (on average 2.099647473560517) internal successors, (35736), 17020 states have internal predecessors, (35736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17021 states to 17021 states and 35736 transitions. [2021-08-21 18:54:54,656 INFO L78 Accepts]: Start accepts. Automaton has 17021 states and 35736 transitions. Word has length 35 [2021-08-21 18:54:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:54,656 INFO L470 AbstractCegarLoop]: Abstraction has 17021 states and 35736 transitions. [2021-08-21 18:54:54,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17021 states and 35736 transitions. [2021-08-21 18:54:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:54,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:54,680 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 18:54:54,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-21 18:54:54,680 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1608951488, now seen corresponding path program 1 times [2021-08-21 18:54:54,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:54,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133702335] [2021-08-21 18:54:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:54,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,730 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 18:54:54,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133702335] [2021-08-21 18:54:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133702335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:54,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:54,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:54,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327940519] [2021-08-21 18:54:54,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:54,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,731 INFO L87 Difference]: Start difference. First operand 17021 states and 35736 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:54,850 INFO L93 Difference]: Finished difference Result 19431 states and 40638 transitions. [2021-08-21 18:54:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:54,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:54,880 INFO L225 Difference]: With dead ends: 19431 [2021-08-21 18:54:54,881 INFO L226 Difference]: Without dead ends: 19418 [2021-08-21 18:54:54,881 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 18:54:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-08-21 18:54:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 17091. [2021-08-21 18:54:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17091 states, 17090 states have (on average 2.1022820362785253) internal successors, (35928), 17090 states have internal predecessors, (35928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17091 states to 17091 states and 35928 transitions. [2021-08-21 18:54:55,107 INFO L78 Accepts]: Start accepts. Automaton has 17091 states and 35928 transitions. Word has length 35 [2021-08-21 18:54:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:55,107 INFO L470 AbstractCegarLoop]: Abstraction has 17091 states and 35928 transitions. [2021-08-21 18:54:55,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 17091 states and 35928 transitions. [2021-08-21 18:54:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:55,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:55,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:55,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-21 18:54:55,129 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -151803840, now seen corresponding path program 1 times [2021-08-21 18:54:55,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:55,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793504321] [2021-08-21 18:54:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:55,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:55,181 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 18:54:55,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:55,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793504321] [2021-08-21 18:54:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793504321] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:55,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:55,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:55,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301752162] [2021-08-21 18:54:55,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:55,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:55,182 INFO L87 Difference]: Start difference. First operand 17091 states and 35928 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:55,299 INFO L93 Difference]: Finished difference Result 19643 states and 41549 transitions. [2021-08-21 18:54:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:55,329 INFO L225 Difference]: With dead ends: 19643 [2021-08-21 18:54:55,329 INFO L226 Difference]: Without dead ends: 19634 [2021-08-21 18:54:55,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19634 states. [2021-08-21 18:54:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19634 to 17203. [2021-08-21 18:54:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17203 states, 17202 states have (on average 2.111324264620393) internal successors, (36319), 17202 states have internal predecessors, (36319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17203 states to 17203 states and 36319 transitions. [2021-08-21 18:54:55,544 INFO L78 Accepts]: Start accepts. Automaton has 17203 states and 36319 transitions. Word has length 35 [2021-08-21 18:54:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:55,544 INFO L470 AbstractCegarLoop]: Abstraction has 17203 states and 36319 transitions. [2021-08-21 18:54:55,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17203 states and 36319 transitions. [2021-08-21 18:54:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:55,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:55,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:55,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-08-21 18:54:55,566 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash 531334640, now seen corresponding path program 2 times [2021-08-21 18:54:55,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:55,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915891680] [2021-08-21 18:54:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:55,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:55,621 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 18:54:55,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:55,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915891680] [2021-08-21 18:54:55,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915891680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:55,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197198541] [2021-08-21 18:54:55,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:55,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:55,622 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 18:54:55,623 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 18:54:57,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:57,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:57,235 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 18:54:57,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197198541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:57,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:57,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:57,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329777165] [2021-08-21 18:54:57,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:57,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:57,236 INFO L87 Difference]: Start difference. First operand 17203 states and 36319 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:57,373 INFO L93 Difference]: Finished difference Result 19418 states and 41171 transitions. [2021-08-21 18:54:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:57,407 INFO L225 Difference]: With dead ends: 19418 [2021-08-21 18:54:57,407 INFO L226 Difference]: Without dead ends: 19409 [2021-08-21 18:54:57,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:54:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19409 states. [2021-08-21 18:54:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19409 to 17278. [2021-08-21 18:54:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17278 states, 17277 states have (on average 2.120217630375644) internal successors, (36631), 17277 states have internal predecessors, (36631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17278 states to 17278 states and 36631 transitions. [2021-08-21 18:54:57,644 INFO L78 Accepts]: Start accepts. Automaton has 17278 states and 36631 transitions. Word has length 35 [2021-08-21 18:54:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:57,644 INFO L470 AbstractCegarLoop]: Abstraction has 17278 states and 36631 transitions. [2021-08-21 18:54:57,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17278 states and 36631 transitions. [2021-08-21 18:54:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:57,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:57,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:57,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 18:54:57,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:57,868 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2063603720, now seen corresponding path program 1 times [2021-08-21 18:54:57,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:57,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057316030] [2021-08-21 18:54:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:57,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:57,915 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 18:54:57,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:57,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057316030] [2021-08-21 18:54:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057316030] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:57,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:57,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:57,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537979274] [2021-08-21 18:54:57,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:57,917 INFO L87 Difference]: Start difference. First operand 17278 states and 36631 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:58,030 INFO L93 Difference]: Finished difference Result 19533 states and 41438 transitions. [2021-08-21 18:54:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:58,059 INFO L225 Difference]: With dead ends: 19533 [2021-08-21 18:54:58,060 INFO L226 Difference]: Without dead ends: 19524 [2021-08-21 18:54:58,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:58,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19524 states. [2021-08-21 18:54:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19524 to 17330. [2021-08-21 18:54:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17330 states, 17329 states have (on average 2.125108200126955) internal successors, (36826), 17329 states have internal predecessors, (36826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17330 states to 17330 states and 36826 transitions. [2021-08-21 18:54:58,274 INFO L78 Accepts]: Start accepts. Automaton has 17330 states and 36826 transitions. Word has length 35 [2021-08-21 18:54:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:58,274 INFO L470 AbstractCegarLoop]: Abstraction has 17330 states and 36826 transitions. [2021-08-21 18:54:58,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17330 states and 36826 transitions. [2021-08-21 18:54:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:58,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:58,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:58,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-08-21 18:54:58,300 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash -418681268, now seen corresponding path program 1 times [2021-08-21 18:54:58,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:58,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715391673] [2021-08-21 18:54:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:58,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:58,347 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 18:54:58,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:58,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715391673] [2021-08-21 18:54:58,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715391673] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:58,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:58,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580121793] [2021-08-21 18:54:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:58,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:58,348 INFO L87 Difference]: Start difference. First operand 17330 states and 36826 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:58,471 INFO L93 Difference]: Finished difference Result 19707 states and 41707 transitions. [2021-08-21 18:54:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:58,504 INFO L225 Difference]: With dead ends: 19707 [2021-08-21 18:54:58,504 INFO L226 Difference]: Without dead ends: 19694 [2021-08-21 18:54:58,504 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 18:54:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19694 states. [2021-08-21 18:54:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19694 to 17394. [2021-08-21 18:54:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17394 states, 17393 states have (on average 2.127810038521244) internal successors, (37009), 17393 states have internal predecessors, (37009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17394 states to 17394 states and 37009 transitions. [2021-08-21 18:54:58,728 INFO L78 Accepts]: Start accepts. Automaton has 17394 states and 37009 transitions. Word has length 35 [2021-08-21 18:54:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:58,728 INFO L470 AbstractCegarLoop]: Abstraction has 17394 states and 37009 transitions. [2021-08-21 18:54:58,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 17394 states and 37009 transitions. [2021-08-21 18:54:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:58,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:58,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:58,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-08-21 18:54:58,751 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466380, now seen corresponding path program 1 times [2021-08-21 18:54:58,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:58,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540012123] [2021-08-21 18:54:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:58,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:58,798 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 18:54:58,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:58,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540012123] [2021-08-21 18:54:58,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540012123] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:58,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:58,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:58,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113946836] [2021-08-21 18:54:58,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:58,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:58,799 INFO L87 Difference]: Start difference. First operand 17394 states and 37009 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:58,917 INFO L93 Difference]: Finished difference Result 19892 states and 42545 transitions. [2021-08-21 18:54:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:58,947 INFO L225 Difference]: With dead ends: 19892 [2021-08-21 18:54:58,947 INFO L226 Difference]: Without dead ends: 19883 [2021-08-21 18:54:58,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19883 states. [2021-08-21 18:54:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19883 to 17479. [2021-08-21 18:54:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17479 states, 17478 states have (on average 2.138002059732235) internal successors, (37368), 17478 states have internal predecessors, (37368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17479 states to 17479 states and 37368 transitions. [2021-08-21 18:54:59,167 INFO L78 Accepts]: Start accepts. Automaton has 17479 states and 37368 transitions. Word has length 35 [2021-08-21 18:54:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:59,167 INFO L470 AbstractCegarLoop]: Abstraction has 17479 states and 37368 transitions. [2021-08-21 18:54:59,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:54:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 17479 states and 37368 transitions. [2021-08-21 18:54:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:54:59,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:59,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:59,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-08-21 18:54:59,196 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:54:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash -304011016, now seen corresponding path program 2 times [2021-08-21 18:54:59,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:59,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436329049] [2021-08-21 18:54:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:59,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:59,245 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 18:54:59,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:59,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436329049] [2021-08-21 18:54:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436329049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:59,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954283024] [2021-08-21 18:54:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:59,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:59,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:59,246 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 18:54:59,247 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 18:55:00,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:00,864 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 18:55:00,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954283024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:00,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:00,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860071647] [2021-08-21 18:55:00,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:00,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:00,865 INFO L87 Difference]: Start difference. First operand 17479 states and 37368 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:01,003 INFO L93 Difference]: Finished difference Result 19661 states and 42100 transitions. [2021-08-21 18:55:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:01,038 INFO L225 Difference]: With dead ends: 19661 [2021-08-21 18:55:01,038 INFO L226 Difference]: Without dead ends: 19652 [2021-08-21 18:55:01,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19652 states. [2021-08-21 18:55:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19652 to 17538. [2021-08-21 18:55:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17538 states, 17537 states have (on average 2.143582140616981) internal successors, (37592), 17537 states have internal predecessors, (37592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17538 states to 17538 states and 37592 transitions. [2021-08-21 18:55:01,283 INFO L78 Accepts]: Start accepts. Automaton has 17538 states and 37592 transitions. Word has length 35 [2021-08-21 18:55:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 17538 states and 37592 transitions. [2021-08-21 18:55:01,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17538 states and 37592 transitions. [2021-08-21 18:55:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:01,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:01,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:01,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:55:01,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:01,509 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -176824452, now seen corresponding path program 2 times [2021-08-21 18:55:01,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:01,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640462030] [2021-08-21 18:55:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:01,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:01,564 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 18:55:01,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:01,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640462030] [2021-08-21 18:55:01,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640462030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:01,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923694757] [2021-08-21 18:55:01,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:01,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:01,566 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 18:55:01,566 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 18:55:03,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:03,378 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 18:55:03,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923694757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:03,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:03,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:03,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921120348] [2021-08-21 18:55:03,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:03,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:03,379 INFO L87 Difference]: Start difference. First operand 17538 states and 37592 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:03,516 INFO L93 Difference]: Finished difference Result 19595 states and 41978 transitions. [2021-08-21 18:55:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:03,552 INFO L225 Difference]: With dead ends: 19595 [2021-08-21 18:55:03,552 INFO L226 Difference]: Without dead ends: 19586 [2021-08-21 18:55:03,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19586 states. [2021-08-21 18:55:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19586 to 17565. [2021-08-21 18:55:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 2.1467774994306534) internal successors, (37706), 17564 states have internal predecessors, (37706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 37706 transitions. [2021-08-21 18:55:03,789 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 37706 transitions. Word has length 35 [2021-08-21 18:55:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 17565 states and 37706 transitions. [2021-08-21 18:55:03,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 37706 transitions. [2021-08-21 18:55:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:03,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:03,813 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 18:55:03,833 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 18:55:04,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,014 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -49637888, now seen corresponding path program 2 times [2021-08-21 18:55:04,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:04,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629859892] [2021-08-21 18:55:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:04,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:04,066 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 18:55:04,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:04,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629859892] [2021-08-21 18:55:04,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629859892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:04,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464526304] [2021-08-21 18:55:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:04,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:04,067 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 18:55:04,068 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 18:55:05,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:05,873 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 18:55:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464526304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:05,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:05,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:05,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462330691] [2021-08-21 18:55:05,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:05,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:05,874 INFO L87 Difference]: Start difference. First operand 17565 states and 37706 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:06,015 INFO L93 Difference]: Finished difference Result 19701 states and 42212 transitions. [2021-08-21 18:55:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:06,055 INFO L225 Difference]: With dead ends: 19701 [2021-08-21 18:55:06,055 INFO L226 Difference]: Without dead ends: 19692 [2021-08-21 18:55:06,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19692 states. [2021-08-21 18:55:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19692 to 17596. [2021-08-21 18:55:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17596 states, 17595 states have (on average 2.1485649332196646) internal successors, (37804), 17595 states have internal predecessors, (37804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17596 states to 17596 states and 37804 transitions. [2021-08-21 18:55:06,324 INFO L78 Accepts]: Start accepts. Automaton has 17596 states and 37804 transitions. Word has length 35 [2021-08-21 18:55:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 17596 states and 37804 transitions. [2021-08-21 18:55:06,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 17596 states and 37804 transitions. [2021-08-21 18:55:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:06,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:06,349 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, 1, 1, 1] [2021-08-21 18:55:06,371 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 18:55:06,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:06,569 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1850142076, now seen corresponding path program 4 times [2021-08-21 18:55:06,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:06,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267429284] [2021-08-21 18:55:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:06,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:06,620 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 18:55:06,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267429284] [2021-08-21 18:55:06,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267429284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041115128] [2021-08-21 18:55:06,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:06,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:06,621 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 18:55:06,622 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 18:55:08,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:08,308 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 18:55:08,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041115128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:08,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745567699] [2021-08-21 18:55:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:08,309 INFO L87 Difference]: Start difference. First operand 17596 states and 37804 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:08,455 INFO L93 Difference]: Finished difference Result 19587 states and 42056 transitions. [2021-08-21 18:55:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:08,487 INFO L225 Difference]: With dead ends: 19587 [2021-08-21 18:55:08,487 INFO L226 Difference]: Without dead ends: 19578 [2021-08-21 18:55:08,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19578 states. [2021-08-21 18:55:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19578 to 17608. [2021-08-21 18:55:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17608 states, 17607 states have (on average 2.151189867666269) internal successors, (37876), 17607 states have internal predecessors, (37876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17608 states to 17608 states and 37876 transitions. [2021-08-21 18:55:08,720 INFO L78 Accepts]: Start accepts. Automaton has 17608 states and 37876 transitions. Word has length 35 [2021-08-21 18:55:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:08,720 INFO L470 AbstractCegarLoop]: Abstraction has 17608 states and 37876 transitions. [2021-08-21 18:55:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 17608 states and 37876 transitions. [2021-08-21 18:55:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:08,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:08,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:08,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:55:08,960 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,SelfDestructingSolverStorable134 [2021-08-21 18:55:08,961 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1595768948, now seen corresponding path program 4 times [2021-08-21 18:55:08,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:08,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172429644] [2021-08-21 18:55:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:08,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:09,009 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 18:55:09,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:09,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172429644] [2021-08-21 18:55:09,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172429644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:09,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775335466] [2021-08-21 18:55:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:09,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:09,010 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 18:55:09,010 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 18:55:10,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:10,750 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 18:55:10,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775335466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:10,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:10,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:10,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75742307] [2021-08-21 18:55:10,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:10,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:10,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:10,751 INFO L87 Difference]: Start difference. First operand 17608 states and 37876 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:10,882 INFO L93 Difference]: Finished difference Result 19475 states and 41761 transitions. [2021-08-21 18:55:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:10,916 INFO L225 Difference]: With dead ends: 19475 [2021-08-21 18:55:10,916 INFO L226 Difference]: Without dead ends: 19466 [2021-08-21 18:55:10,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:55:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19466 states. [2021-08-21 18:55:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19466 to 17612. [2021-08-21 18:55:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17612 states, 17611 states have (on average 2.1522911816478336) internal successors, (37904), 17611 states have internal predecessors, (37904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17612 states to 17612 states and 37904 transitions. [2021-08-21 18:55:11,184 INFO L78 Accepts]: Start accepts. Automaton has 17612 states and 37904 transitions. Word has length 35 [2021-08-21 18:55:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:11,184 INFO L470 AbstractCegarLoop]: Abstraction has 17612 states and 37904 transitions. [2021-08-21 18:55:11,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 17612 states and 37904 transitions. [2021-08-21 18:55:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:11,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:11,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:11,227 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 18:55:11,408 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,SelfDestructingSolverStorable135 [2021-08-21 18:55:11,408 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1468582384, now seen corresponding path program 4 times [2021-08-21 18:55:11,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:11,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844582100] [2021-08-21 18:55:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:11,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:11,475 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 18:55:11,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:11,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844582100] [2021-08-21 18:55:11,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844582100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911302333] [2021-08-21 18:55:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:11,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:11,476 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 18:55:11,476 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 18:55:13,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:13,261 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 18:55:13,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911302333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:13,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:13,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357899782] [2021-08-21 18:55:13,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:13,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:13,262 INFO L87 Difference]: Start difference. First operand 17612 states and 37904 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:13,419 INFO L93 Difference]: Finished difference Result 19551 states and 41937 transitions. [2021-08-21 18:55:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:13,453 INFO L225 Difference]: With dead ends: 19551 [2021-08-21 18:55:13,453 INFO L226 Difference]: Without dead ends: 19542 [2021-08-21 18:55:13,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2021-08-21 18:55:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 17619. [2021-08-21 18:55:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17619 states, 17618 states have (on average 2.153933477125667) internal successors, (37948), 17618 states have internal predecessors, (37948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17619 states to 17619 states and 37948 transitions. [2021-08-21 18:55:13,703 INFO L78 Accepts]: Start accepts. Automaton has 17619 states and 37948 transitions. Word has length 35 [2021-08-21 18:55:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:13,703 INFO L470 AbstractCegarLoop]: Abstraction has 17619 states and 37948 transitions. [2021-08-21 18:55:13,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 17619 states and 37948 transitions. [2021-08-21 18:55:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:13,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:13,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:13,747 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 18:55:13,938 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,SelfDestructingSolverStorable136 [2021-08-21 18:55:13,939 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash 111248760, now seen corresponding path program 2 times [2021-08-21 18:55:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:13,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266935772] [2021-08-21 18:55:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:13,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:13,991 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 18:55:13,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:13,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266935772] [2021-08-21 18:55:13,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266935772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792046913] [2021-08-21 18:55:13,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:13,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:13,993 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 18:55:13,994 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 18:55:15,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:15,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:15,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:15,805 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 18:55:15,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792046913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:15,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:15,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111758831] [2021-08-21 18:55:15,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:15,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:15,806 INFO L87 Difference]: Start difference. First operand 17619 states and 37948 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:15,931 INFO L93 Difference]: Finished difference Result 19719 states and 42351 transitions. [2021-08-21 18:55:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:15,963 INFO L225 Difference]: With dead ends: 19719 [2021-08-21 18:55:15,964 INFO L226 Difference]: Without dead ends: 19710 [2021-08-21 18:55:15,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19710 states. [2021-08-21 18:55:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19710 to 17646. [2021-08-21 18:55:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17646 states, 17645 states have (on average 2.1565315953527913) internal successors, (38052), 17645 states have internal predecessors, (38052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17646 states to 17646 states and 38052 transitions. [2021-08-21 18:55:16,199 INFO L78 Accepts]: Start accepts. Automaton has 17646 states and 38052 transitions. Word has length 35 [2021-08-21 18:55:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:16,199 INFO L470 AbstractCegarLoop]: Abstraction has 17646 states and 38052 transitions. [2021-08-21 18:55:16,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 17646 states and 38052 transitions. [2021-08-21 18:55:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:16,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:16,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:16,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 18:55:16,424 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,SelfDestructingSolverStorable137 [2021-08-21 18:55:16,425 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -300290444, now seen corresponding path program 2 times [2021-08-21 18:55:16,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:16,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343409784] [2021-08-21 18:55:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:16,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:16,479 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 18:55:16,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:16,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343409784] [2021-08-21 18:55:16,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343409784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:16,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405290226] [2021-08-21 18:55:16,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:16,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:16,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:16,481 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 18:55:16,481 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 18:55:18,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:18,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:18,219 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 18:55:18,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405290226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:18,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:18,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771851309] [2021-08-21 18:55:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:18,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:18,220 INFO L87 Difference]: Start difference. First operand 17646 states and 38052 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:18,342 INFO L93 Difference]: Finished difference Result 19825 states and 42555 transitions. [2021-08-21 18:55:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:18,376 INFO L225 Difference]: With dead ends: 19825 [2021-08-21 18:55:18,376 INFO L226 Difference]: Without dead ends: 19816 [2021-08-21 18:55:18,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19816 states. [2021-08-21 18:55:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19816 to 17674. [2021-08-21 18:55:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17674 states, 17673 states have (on average 2.157641600181067) internal successors, (38132), 17673 states have internal predecessors, (38132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 38132 transitions. [2021-08-21 18:55:18,620 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 38132 transitions. Word has length 35 [2021-08-21 18:55:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:18,620 INFO L470 AbstractCegarLoop]: Abstraction has 17674 states and 38132 transitions. [2021-08-21 18:55:18,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 38132 transitions. [2021-08-21 18:55:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:18,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:18,644 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, 1, 1, 1] [2021-08-21 18:55:18,666 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 18:55:18,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:18,849 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1137187532, now seen corresponding path program 1 times [2021-08-21 18:55:18,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:18,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972506897] [2021-08-21 18:55:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:18,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:18,921 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 18:55:18,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:18,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972506897] [2021-08-21 18:55:18,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972506897] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:18,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:18,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:18,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293589007] [2021-08-21 18:55:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:18,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:18,922 INFO L87 Difference]: Start difference. First operand 17674 states and 38132 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:19,038 INFO L93 Difference]: Finished difference Result 19879 states and 42489 transitions. [2021-08-21 18:55:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:19,071 INFO L225 Difference]: With dead ends: 19879 [2021-08-21 18:55:19,071 INFO L226 Difference]: Without dead ends: 19866 [2021-08-21 18:55:19,071 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 18:55:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19866 states. [2021-08-21 18:55:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19866 to 17712. [2021-08-21 18:55:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17712 states, 17711 states have (on average 2.158601998757834) internal successors, (38231), 17711 states have internal predecessors, (38231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17712 states to 17712 states and 38231 transitions. [2021-08-21 18:55:19,325 INFO L78 Accepts]: Start accepts. Automaton has 17712 states and 38231 transitions. Word has length 35 [2021-08-21 18:55:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 17712 states and 38231 transitions. [2021-08-21 18:55:19,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17712 states and 38231 transitions. [2021-08-21 18:55:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:19,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:19,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:19,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-08-21 18:55:19,352 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1700632116, now seen corresponding path program 1 times [2021-08-21 18:55:19,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:19,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035950170] [2021-08-21 18:55:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:19,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:19,409 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 18:55:19,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:19,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035950170] [2021-08-21 18:55:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035950170] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:19,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:19,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:19,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683783396] [2021-08-21 18:55:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:19,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:19,410 INFO L87 Difference]: Start difference. First operand 17712 states and 38231 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:19,538 INFO L93 Difference]: Finished difference Result 20022 states and 43123 transitions. [2021-08-21 18:55:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:19,573 INFO L225 Difference]: With dead ends: 20022 [2021-08-21 18:55:19,573 INFO L226 Difference]: Without dead ends: 20013 [2021-08-21 18:55:19,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 18:55:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20013 states. [2021-08-21 18:55:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20013 to 17750. [2021-08-21 18:55:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.162319003887543) internal successors, (38379), 17749 states have internal predecessors, (38379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 38379 transitions. [2021-08-21 18:55:19,815 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 38379 transitions. Word has length 35 [2021-08-21 18:55:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 17750 states and 38379 transitions. [2021-08-21 18:55:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 38379 transitions. [2021-08-21 18:55:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:19,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:19,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:19,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-21 18:55:19,840 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -568092424, now seen corresponding path program 2 times [2021-08-21 18:55:19,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:19,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137063342] [2021-08-21 18:55:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:19,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:19,888 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 18:55:19,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:19,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137063342] [2021-08-21 18:55:19,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137063342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:19,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004294809] [2021-08-21 18:55:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:19,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:19,889 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 18:55:19,890 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 18:55:21,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:21,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:21,786 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 18:55:21,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004294809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:21,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:21,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:21,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340236463] [2021-08-21 18:55:21,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:21,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:21,787 INFO L87 Difference]: Start difference. First operand 17750 states and 38379 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:21,938 INFO L93 Difference]: Finished difference Result 19636 states and 42154 transitions. [2021-08-21 18:55:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:21,973 INFO L225 Difference]: With dead ends: 19636 [2021-08-21 18:55:21,974 INFO L226 Difference]: Without dead ends: 19627 [2021-08-21 18:55:21,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19627 states. [2021-08-21 18:55:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19627 to 17760. [2021-08-21 18:55:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.162509150289994) internal successors, (38404), 17759 states have internal predecessors, (38404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 38404 transitions. [2021-08-21 18:55:22,220 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 38404 transitions. Word has length 35 [2021-08-21 18:55:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:22,220 INFO L470 AbstractCegarLoop]: Abstraction has 17760 states and 38404 transitions. [2021-08-21 18:55:22,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 38404 transitions. [2021-08-21 18:55:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:22,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:22,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:22,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 18:55:22,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:22,448 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash -561027460, now seen corresponding path program 2 times [2021-08-21 18:55:22,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:22,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686405091] [2021-08-21 18:55:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:22,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:22,498 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 18:55:22,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:22,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686405091] [2021-08-21 18:55:22,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686405091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426521611] [2021-08-21 18:55:22,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:22,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:22,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:22,499 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 18:55:22,500 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 18:55:24,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:24,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:24,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:24,383 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 18:55:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426521611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:24,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:24,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:24,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832479615] [2021-08-21 18:55:24,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:24,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:24,384 INFO L87 Difference]: Start difference. First operand 17760 states and 38404 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:24,512 INFO L93 Difference]: Finished difference Result 19944 states and 43193 transitions. [2021-08-21 18:55:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:24,545 INFO L225 Difference]: With dead ends: 19944 [2021-08-21 18:55:24,545 INFO L226 Difference]: Without dead ends: 19935 [2021-08-21 18:55:24,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19935 states. [2021-08-21 18:55:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19935 to 17819. [2021-08-21 18:55:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17819 states, 17818 states have (on average 2.1716242002469412) internal successors, (38694), 17818 states have internal predecessors, (38694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17819 states to 17819 states and 38694 transitions. [2021-08-21 18:55:24,799 INFO L78 Accepts]: Start accepts. Automaton has 17819 states and 38694 transitions. Word has length 35 [2021-08-21 18:55:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:24,799 INFO L470 AbstractCegarLoop]: Abstraction has 17819 states and 38694 transitions. [2021-08-21 18:55:24,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17819 states and 38694 transitions. [2021-08-21 18:55:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:24,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:24,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:24,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 18:55:25,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,025 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash -171936380, now seen corresponding path program 2 times [2021-08-21 18:55:25,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:25,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125667311] [2021-08-21 18:55:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:25,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:25,093 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 18:55:25,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:25,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125667311] [2021-08-21 18:55:25,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125667311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283758573] [2021-08-21 18:55:25,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:25,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:25,094 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 18:55:25,094 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 18:55:26,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:26,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:26,983 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 18:55:26,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283758573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:26,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:26,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:26,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407383945] [2021-08-21 18:55:26,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:26,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:26,984 INFO L87 Difference]: Start difference. First operand 17819 states and 38694 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:27,125 INFO L93 Difference]: Finished difference Result 19878 states and 43063 transitions. [2021-08-21 18:55:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:27,161 INFO L225 Difference]: With dead ends: 19878 [2021-08-21 18:55:27,161 INFO L226 Difference]: Without dead ends: 19869 [2021-08-21 18:55:27,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19869 states. [2021-08-21 18:55:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19869 to 17846. [2021-08-21 18:55:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17846 states, 17845 states have (on average 2.175847576351919) internal successors, (38828), 17845 states have internal predecessors, (38828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17846 states to 17846 states and 38828 transitions. [2021-08-21 18:55:27,413 INFO L78 Accepts]: Start accepts. Automaton has 17846 states and 38828 transitions. Word has length 35 [2021-08-21 18:55:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:27,413 INFO L470 AbstractCegarLoop]: Abstraction has 17846 states and 38828 transitions. [2021-08-21 18:55:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 17846 states and 38828 transitions. [2021-08-21 18:55:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:27,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:27,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:27,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 18:55:27,638 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,SelfDestructingSolverStorable143 [2021-08-21 18:55:27,638 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2124874488, now seen corresponding path program 2 times [2021-08-21 18:55:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:27,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302393528] [2021-08-21 18:55:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:27,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:27,692 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 18:55:27,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:27,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302393528] [2021-08-21 18:55:27,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302393528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:27,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131837444] [2021-08-21 18:55:27,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:27,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:27,693 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 18:55:27,695 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 18:55:29,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:29,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:29,581 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 18:55:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131837444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:29,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:29,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:29,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135998291] [2021-08-21 18:55:29,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:29,582 INFO L87 Difference]: Start difference. First operand 17846 states and 38828 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:29,702 INFO L93 Difference]: Finished difference Result 19984 states and 43349 transitions. [2021-08-21 18:55:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:29,733 INFO L225 Difference]: With dead ends: 19984 [2021-08-21 18:55:29,734 INFO L226 Difference]: Without dead ends: 19975 [2021-08-21 18:55:29,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19975 states. [2021-08-21 18:55:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19975 to 17883. [2021-08-21 18:55:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 2.1796778883793757) internal successors, (38977), 17882 states have internal predecessors, (38977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 38977 transitions. [2021-08-21 18:55:29,965 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 38977 transitions. Word has length 35 [2021-08-21 18:55:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:29,965 INFO L470 AbstractCegarLoop]: Abstraction has 17883 states and 38977 transitions. [2021-08-21 18:55:29,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 38977 transitions. [2021-08-21 18:55:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:29,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:29,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:30,017 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 18:55:30,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,215 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash 96228600, now seen corresponding path program 1 times [2021-08-21 18:55:30,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:30,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576896907] [2021-08-21 18:55:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:30,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:30,263 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 18:55:30,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:30,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576896907] [2021-08-21 18:55:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576896907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:30,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:30,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:55:30,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22065578] [2021-08-21 18:55:30,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:30,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:30,264 INFO L87 Difference]: Start difference. First operand 17883 states and 38977 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:30,387 INFO L93 Difference]: Finished difference Result 20326 states and 43998 transitions. [2021-08-21 18:55:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:30,422 INFO L225 Difference]: With dead ends: 20326 [2021-08-21 18:55:30,423 INFO L226 Difference]: Without dead ends: 20313 [2021-08-21 18:55:30,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2021-08-21 18:55:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 17931. [2021-08-21 18:55:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.1823201338538762) internal successors, (39129), 17930 states have internal predecessors, (39129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 39129 transitions. [2021-08-21 18:55:30,667 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 39129 transitions. Word has length 35 [2021-08-21 18:55:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:30,667 INFO L470 AbstractCegarLoop]: Abstraction has 17931 states and 39129 transitions. [2021-08-21 18:55:30,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 39129 transitions. [2021-08-21 18:55:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:30,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:30,691 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, 1, 1, 1] [2021-08-21 18:55:30,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-21 18:55:30,691 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:30,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1828523896, now seen corresponding path program 2 times [2021-08-21 18:55:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:30,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188497736] [2021-08-21 18:55:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:30,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:30,739 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 18:55:30,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:30,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188497736] [2021-08-21 18:55:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188497736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246317645] [2021-08-21 18:55:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:30,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:30,740 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 18:55:30,741 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 18:55:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:32,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:32,642 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 18:55:32,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246317645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:32,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:32,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:32,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630178989] [2021-08-21 18:55:32,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:32,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:32,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:32,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:32,643 INFO L87 Difference]: Start difference. First operand 17931 states and 39129 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:32,780 INFO L93 Difference]: Finished difference Result 20144 states and 43969 transitions. [2021-08-21 18:55:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:32,813 INFO L225 Difference]: With dead ends: 20144 [2021-08-21 18:55:32,814 INFO L226 Difference]: Without dead ends: 20135 [2021-08-21 18:55:32,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20135 states. [2021-08-21 18:55:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20135 to 17990. [2021-08-21 18:55:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17990 states, 17989 states have (on average 2.190060592584357) internal successors, (39397), 17989 states have internal predecessors, (39397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17990 states to 17990 states and 39397 transitions. [2021-08-21 18:55:33,052 INFO L78 Accepts]: Start accepts. Automaton has 17990 states and 39397 transitions. Word has length 35 [2021-08-21 18:55:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:33,053 INFO L470 AbstractCegarLoop]: Abstraction has 17990 states and 39397 transitions. [2021-08-21 18:55:33,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17990 states and 39397 transitions. [2021-08-21 18:55:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:33,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:33,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:33,098 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 18:55:33,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 18:55:33,290 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1211336564, now seen corresponding path program 2 times [2021-08-21 18:55:33,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:33,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508271944] [2021-08-21 18:55:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:33,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:33,381 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 18:55:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508271944] [2021-08-21 18:55:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508271944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779267822] [2021-08-21 18:55:33,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:33,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:33,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:33,382 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 18:55:33,383 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 18:55:35,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:35,316 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 18:55:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779267822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:35,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:35,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:35,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80304074] [2021-08-21 18:55:35,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:35,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:35,317 INFO L87 Difference]: Start difference. First operand 17990 states and 39397 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:35,532 INFO L93 Difference]: Finished difference Result 20250 states and 44309 transitions. [2021-08-21 18:55:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:35,568 INFO L225 Difference]: With dead ends: 20250 [2021-08-21 18:55:35,568 INFO L226 Difference]: Without dead ends: 20241 [2021-08-21 18:55:35,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20241 states. [2021-08-21 18:55:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20241 to 18065. [2021-08-21 18:55:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18065 states, 18064 states have (on average 2.1966895482728077) internal successors, (39681), 18064 states have internal predecessors, (39681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18065 states to 18065 states and 39681 transitions. [2021-08-21 18:55:35,819 INFO L78 Accepts]: Start accepts. Automaton has 18065 states and 39681 transitions. Word has length 35 [2021-08-21 18:55:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:35,819 INFO L470 AbstractCegarLoop]: Abstraction has 18065 states and 39681 transitions. [2021-08-21 18:55:35,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 18065 states and 39681 transitions. [2021-08-21 18:55:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:35,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:35,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:35,865 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 18:55:36,044 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,SelfDestructingSolverStorable147 [2021-08-21 18:55:36,044 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 594149232, now seen corresponding path program 2 times [2021-08-21 18:55:36,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:36,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29165550] [2021-08-21 18:55:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:36,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:36,116 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 18:55:36,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:36,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29165550] [2021-08-21 18:55:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29165550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:36,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176279661] [2021-08-21 18:55:36,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:36,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:36,117 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 18:55:36,118 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 18:55:38,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:38,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:38,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:38,182 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 18:55:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176279661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:38,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228458286] [2021-08-21 18:55:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:38,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:38,183 INFO L87 Difference]: Start difference. First operand 18065 states and 39681 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:38,321 INFO L93 Difference]: Finished difference Result 20160 states and 44131 transitions. [2021-08-21 18:55:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:38,354 INFO L225 Difference]: With dead ends: 20160 [2021-08-21 18:55:38,354 INFO L226 Difference]: Without dead ends: 20151 [2021-08-21 18:55:38,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-08-21 18:55:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 18092. [2021-08-21 18:55:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18092 states, 18091 states have (on average 2.2002653252998727) internal successors, (39805), 18091 states have internal predecessors, (39805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18092 states to 18092 states and 39805 transitions. [2021-08-21 18:55:38,597 INFO L78 Accepts]: Start accepts. Automaton has 18092 states and 39805 transitions. Word has length 35 [2021-08-21 18:55:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:38,597 INFO L470 AbstractCegarLoop]: Abstraction has 18092 states and 39805 transitions. [2021-08-21 18:55:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18092 states and 39805 transitions. [2021-08-21 18:55:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:38,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:38,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:38,643 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 18:55:38,822 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,SelfDestructingSolverStorable148 [2021-08-21 18:55:38,823 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash -23038100, now seen corresponding path program 2 times [2021-08-21 18:55:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:38,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410694612] [2021-08-21 18:55:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:38,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:38,874 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 18:55:38,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:38,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410694612] [2021-08-21 18:55:38,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410694612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:38,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489965045] [2021-08-21 18:55:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:38,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:38,875 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 18:55:38,876 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 18:55:40,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:40,868 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 18:55:40,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489965045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:40,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:40,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758453254] [2021-08-21 18:55:40,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:40,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:40,869 INFO L87 Difference]: Start difference. First operand 18092 states and 39805 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,989 INFO L93 Difference]: Finished difference Result 20266 states and 44392 transitions. [2021-08-21 18:55:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:41,025 INFO L225 Difference]: With dead ends: 20266 [2021-08-21 18:55:41,025 INFO L226 Difference]: Without dead ends: 20257 [2021-08-21 18:55:41,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-08-21 18:55:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 18123. [2021-08-21 18:55:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18123 states, 18122 states have (on average 2.2020196446308353) internal successors, (39905), 18122 states have internal predecessors, (39905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18123 states to 18123 states and 39905 transitions. [2021-08-21 18:55:41,274 INFO L78 Accepts]: Start accepts. Automaton has 18123 states and 39905 transitions. Word has length 35 [2021-08-21 18:55:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:41,274 INFO L470 AbstractCegarLoop]: Abstraction has 18123 states and 39905 transitions. [2021-08-21 18:55:41,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18123 states and 39905 transitions. [2021-08-21 18:55:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:41,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:41,302 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, 1, 1, 1] [2021-08-21 18:55:41,325 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 18:55:41,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,503 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1094329876, now seen corresponding path program 5 times [2021-08-21 18:55:41,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:41,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868463615] [2021-08-21 18:55:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:41,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:41,578 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 18:55:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868463615] [2021-08-21 18:55:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868463615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066558250] [2021-08-21 18:55:41,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:41,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:41,579 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 18:55:41,580 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 18:55:43,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:43,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:43,685 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 18:55:43,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066558250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:43,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:43,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:43,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890433343] [2021-08-21 18:55:43,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:43,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:43,686 INFO L87 Difference]: Start difference. First operand 18123 states and 39905 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:43,826 INFO L93 Difference]: Finished difference Result 19966 states and 43991 transitions. [2021-08-21 18:55:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:43,864 INFO L225 Difference]: With dead ends: 19966 [2021-08-21 18:55:43,865 INFO L226 Difference]: Without dead ends: 19957 [2021-08-21 18:55:43,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-08-21 18:55:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18208. [2021-08-21 18:55:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18208 states, 18207 states have (on average 2.211951447245565) internal successors, (40273), 18207 states have internal predecessors, (40273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18208 states to 18208 states and 40273 transitions. [2021-08-21 18:55:44,106 INFO L78 Accepts]: Start accepts. Automaton has 18208 states and 40273 transitions. Word has length 35 [2021-08-21 18:55:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:44,106 INFO L470 AbstractCegarLoop]: Abstraction has 18208 states and 40273 transitions. [2021-08-21 18:55:44,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 18208 states and 40273 transitions. [2021-08-21 18:55:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:44,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:44,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:44,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 18:55:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:44,332 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2060342792, now seen corresponding path program 6 times [2021-08-21 18:55:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:44,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333884310] [2021-08-21 18:55:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:44,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:44,386 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 18:55:44,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:44,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333884310] [2021-08-21 18:55:44,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333884310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:44,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141380473] [2021-08-21 18:55:44,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:44,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:44,387 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 18:55:44,387 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 18:55:46,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:46,427 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 18:55:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141380473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:46,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:46,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:46,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610888213] [2021-08-21 18:55:46,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:46,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:46,428 INFO L87 Difference]: Start difference. First operand 18208 states and 40273 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:46,588 INFO L93 Difference]: Finished difference Result 19957 states and 44067 transitions. [2021-08-21 18:55:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:46,623 INFO L225 Difference]: With dead ends: 19957 [2021-08-21 18:55:46,623 INFO L226 Difference]: Without dead ends: 19948 [2021-08-21 18:55:46,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19948 states. [2021-08-21 18:55:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19948 to 18250. [2021-08-21 18:55:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18250 states, 18249 states have (on average 2.217326976820648) internal successors, (40464), 18249 states have internal predecessors, (40464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18250 states to 18250 states and 40464 transitions. [2021-08-21 18:55:46,882 INFO L78 Accepts]: Start accepts. Automaton has 18250 states and 40464 transitions. Word has length 35 [2021-08-21 18:55:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:46,882 INFO L470 AbstractCegarLoop]: Abstraction has 18250 states and 40464 transitions. [2021-08-21 18:55:46,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18250 states and 40464 transitions. [2021-08-21 18:55:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:46,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:46,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:46,929 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 18:55:47,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:47,108 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:47,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1625737408, now seen corresponding path program 3 times [2021-08-21 18:55:47,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:47,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728305400] [2021-08-21 18:55:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:47,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:47,177 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 18:55:47,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728305400] [2021-08-21 18:55:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728305400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898756818] [2021-08-21 18:55:47,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:47,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:47,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:47,178 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 18:55:47,179 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 18:55:49,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:49,216 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 18:55:49,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898756818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:49,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:49,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:49,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929082860] [2021-08-21 18:55:49,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:49,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:49,217 INFO L87 Difference]: Start difference. First operand 18250 states and 40464 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:49,363 INFO L93 Difference]: Finished difference Result 20414 states and 45229 transitions. [2021-08-21 18:55:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:49,399 INFO L225 Difference]: With dead ends: 20414 [2021-08-21 18:55:49,399 INFO L226 Difference]: Without dead ends: 20405 [2021-08-21 18:55:49,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20405 states. [2021-08-21 18:55:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20405 to 18296. [2021-08-21 18:55:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 2.223394370046461) internal successors, (40677), 18295 states have internal predecessors, (40677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 40677 transitions. [2021-08-21 18:55:49,652 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 40677 transitions. Word has length 35 [2021-08-21 18:55:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:49,652 INFO L470 AbstractCegarLoop]: Abstraction has 18296 states and 40677 transitions. [2021-08-21 18:55:49,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 40677 transitions. [2021-08-21 18:55:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:49,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:49,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:49,701 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 18:55:49,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:49,879 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash -432381876, now seen corresponding path program 3 times [2021-08-21 18:55:49,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:49,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237222294] [2021-08-21 18:55:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:49,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:49,937 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 18:55:49,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:49,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237222294] [2021-08-21 18:55:49,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237222294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:49,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254410004] [2021-08-21 18:55:49,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:49,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:49,938 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 18:55:49,939 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 18:55:51,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:51,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:52,096 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 18:55:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254410004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:52,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157376496] [2021-08-21 18:55:52,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:52,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:52,097 INFO L87 Difference]: Start difference. First operand 18296 states and 40677 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:52,279 INFO L93 Difference]: Finished difference Result 20476 states and 45369 transitions. [2021-08-21 18:55:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:52,314 INFO L225 Difference]: With dead ends: 20476 [2021-08-21 18:55:52,314 INFO L226 Difference]: Without dead ends: 20467 [2021-08-21 18:55:52,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20467 states. [2021-08-21 18:55:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20467 to 18333. [2021-08-21 18:55:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 2.2268164957451453) internal successors, (40822), 18332 states have internal predecessors, (40822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 40822 transitions. [2021-08-21 18:55:52,561 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 40822 transitions. Word has length 35 [2021-08-21 18:55:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:52,562 INFO L470 AbstractCegarLoop]: Abstraction has 18333 states and 40822 transitions. [2021-08-21 18:55:52,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 40822 transitions. [2021-08-21 18:55:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:52,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:52,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:52,609 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 18:55:52,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:52,788 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 906708672, now seen corresponding path program 3 times [2021-08-21 18:55:52,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:52,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211710051] [2021-08-21 18:55:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:52,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:52,840 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 18:55:52,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:52,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211710051] [2021-08-21 18:55:52,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211710051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461274664] [2021-08-21 18:55:52,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:52,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:52,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:52,845 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 18:55:52,858 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 18:55:54,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:54,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:55,023 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 18:55:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461274664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63599772] [2021-08-21 18:55:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:55,024 INFO L87 Difference]: Start difference. First operand 18333 states and 40822 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:55,152 INFO L93 Difference]: Finished difference Result 20468 states and 45502 transitions. [2021-08-21 18:55:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:55,185 INFO L225 Difference]: With dead ends: 20468 [2021-08-21 18:55:55,185 INFO L226 Difference]: Without dead ends: 20459 [2021-08-21 18:55:55,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:55:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20459 states. [2021-08-21 18:55:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20459 to 18362. [2021-08-21 18:55:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18362 states, 18361 states have (on average 2.2307608518054574) internal successors, (40959), 18361 states have internal predecessors, (40959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18362 states to 18362 states and 40959 transitions. [2021-08-21 18:55:55,425 INFO L78 Accepts]: Start accepts. Automaton has 18362 states and 40959 transitions. Word has length 35 [2021-08-21 18:55:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:55,425 INFO L470 AbstractCegarLoop]: Abstraction has 18362 states and 40959 transitions. [2021-08-21 18:55:55,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 18362 states and 40959 transitions. [2021-08-21 18:55:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:55,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:55,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:55,470 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 18:55:55,649 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,SelfDestructingSolverStorable154 [2021-08-21 18:55:55,650 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1273096768, now seen corresponding path program 3 times [2021-08-21 18:55:55,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:55,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145469620] [2021-08-21 18:55:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:55,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:55,699 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 18:55:55,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:55,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145469620] [2021-08-21 18:55:55,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145469620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142763925] [2021-08-21 18:55:55,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:55,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:55,701 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 18:55:55,722 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 18:55:57,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:57,804 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 18:55:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142763925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:57,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:57,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:57,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302216144] [2021-08-21 18:55:57,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:57,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:57,805 INFO L87 Difference]: Start difference. First operand 18362 states and 40959 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:57,931 INFO L93 Difference]: Finished difference Result 20321 states and 45072 transitions. [2021-08-21 18:55:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:57,963 INFO L225 Difference]: With dead ends: 20321 [2021-08-21 18:55:57,964 INFO L226 Difference]: Without dead ends: 20312 [2021-08-21 18:55:57,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:55:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20312 states. [2021-08-21 18:55:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20312 to 18372. [2021-08-21 18:55:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18372 states, 18371 states have (on average 2.2321049480158948) internal successors, (41006), 18371 states have internal predecessors, (41006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18372 states to 18372 states and 41006 transitions. [2021-08-21 18:55:58,196 INFO L78 Accepts]: Start accepts. Automaton has 18372 states and 41006 transitions. Word has length 35 [2021-08-21 18:55:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:58,196 INFO L470 AbstractCegarLoop]: Abstraction has 18372 states and 41006 transitions. [2021-08-21 18:55:58,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:55:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18372 states and 41006 transitions. [2021-08-21 18:55:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:55:58,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:58,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:58,243 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 18:55:58,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,422 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:55:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:58,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1376948076, now seen corresponding path program 3 times [2021-08-21 18:55:58,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:58,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138795070] [2021-08-21 18:55:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:58,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:58,475 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 18:55:58,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:58,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138795070] [2021-08-21 18:55:58,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138795070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:58,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847055446] [2021-08-21 18:55:58,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:58,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:58,477 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 18:55:58,477 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 18:56:00,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:00,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:00,578 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 18:56:00,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847055446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:00,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:00,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:00,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365317979] [2021-08-21 18:56:00,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:00,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:00,579 INFO L87 Difference]: Start difference. First operand 18372 states and 41006 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:00,708 INFO L93 Difference]: Finished difference Result 20457 states and 45211 transitions. [2021-08-21 18:56:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:00,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:00,744 INFO L225 Difference]: With dead ends: 20457 [2021-08-21 18:56:00,744 INFO L226 Difference]: Without dead ends: 20444 [2021-08-21 18:56:00,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20444 states. [2021-08-21 18:56:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20444 to 18388. [2021-08-21 18:56:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18388 states, 18387 states have (on average 2.233643334964921) internal successors, (41070), 18387 states have internal predecessors, (41070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18388 states to 18388 states and 41070 transitions. [2021-08-21 18:56:00,999 INFO L78 Accepts]: Start accepts. Automaton has 18388 states and 41070 transitions. Word has length 35 [2021-08-21 18:56:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 18388 states and 41070 transitions. [2021-08-21 18:56:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18388 states and 41070 transitions. [2021-08-21 18:56:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:01,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:01,029 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 18:56:01,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 18:56:01,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 18:56:01,229 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 80199572, now seen corresponding path program 3 times [2021-08-21 18:56:01,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:01,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942451400] [2021-08-21 18:56:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:01,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,282 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 18:56:01,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942451400] [2021-08-21 18:56:01,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942451400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:01,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719824510] [2021-08-21 18:56:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:01,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:01,283 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 18:56:01,285 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 18:56:03,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:03,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:03,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:03,458 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 18:56:03,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719824510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:03,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:03,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:03,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754081315] [2021-08-21 18:56:03,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:03,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:03,459 INFO L87 Difference]: Start difference. First operand 18388 states and 41070 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:03,587 INFO L93 Difference]: Finished difference Result 20627 states and 45994 transitions. [2021-08-21 18:56:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:03,621 INFO L225 Difference]: With dead ends: 20627 [2021-08-21 18:56:03,621 INFO L226 Difference]: Without dead ends: 20618 [2021-08-21 18:56:03,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20618 states. [2021-08-21 18:56:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20618 to 18439. [2021-08-21 18:56:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18439 states, 18438 states have (on average 2.237227465017898) internal successors, (41250), 18438 states have internal predecessors, (41250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18439 states to 18439 states and 41250 transitions. [2021-08-21 18:56:03,878 INFO L78 Accepts]: Start accepts. Automaton has 18439 states and 41250 transitions. Word has length 35 [2021-08-21 18:56:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:03,878 INFO L470 AbstractCegarLoop]: Abstraction has 18439 states and 41250 transitions. [2021-08-21 18:56:03,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 18439 states and 41250 transitions. [2021-08-21 18:56:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:03,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:03,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:03,924 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 18:56:04,103 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,SelfDestructingSolverStorable157 [2021-08-21 18:56:04,103 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -53193924, now seen corresponding path program 3 times [2021-08-21 18:56:04,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:04,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353101059] [2021-08-21 18:56:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:04,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:04,152 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 18:56:04,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353101059] [2021-08-21 18:56:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353101059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534273325] [2021-08-21 18:56:04,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:04,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:04,153 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 18:56:04,153 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 18:56:06,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:06,349 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 18:56:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534273325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:06,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:06,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:06,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523706102] [2021-08-21 18:56:06,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:06,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:06,350 INFO L87 Difference]: Start difference. First operand 18439 states and 41250 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:06,490 INFO L93 Difference]: Finished difference Result 20704 states and 46251 transitions. [2021-08-21 18:56:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:06,524 INFO L225 Difference]: With dead ends: 20704 [2021-08-21 18:56:06,524 INFO L226 Difference]: Without dead ends: 20695 [2021-08-21 18:56:06,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20695 states. [2021-08-21 18:56:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20695 to 18523. [2021-08-21 18:56:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 2.2473814922794513) internal successors, (41626), 18522 states have internal predecessors, (41626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 41626 transitions. [2021-08-21 18:56:06,772 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 41626 transitions. Word has length 35 [2021-08-21 18:56:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:06,772 INFO L470 AbstractCegarLoop]: Abstraction has 18523 states and 41626 transitions. [2021-08-21 18:56:06,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 41626 transitions. [2021-08-21 18:56:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:06,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:06,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:06,819 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 18:56:06,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 18:56:06,998 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1140161608, now seen corresponding path program 3 times [2021-08-21 18:56:06,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:06,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057201571] [2021-08-21 18:56:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:06,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:07,072 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 18:56:07,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:07,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057201571] [2021-08-21 18:56:07,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057201571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946092617] [2021-08-21 18:56:07,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:07,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:07,073 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 18:56:07,074 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 18:56:09,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:09,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:09,277 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 18:56:09,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946092617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:09,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:09,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:09,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146083101] [2021-08-21 18:56:09,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:09,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:09,278 INFO L87 Difference]: Start difference. First operand 18523 states and 41626 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:09,404 INFO L93 Difference]: Finished difference Result 20776 states and 46454 transitions. [2021-08-21 18:56:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:09,437 INFO L225 Difference]: With dead ends: 20776 [2021-08-21 18:56:09,437 INFO L226 Difference]: Without dead ends: 20767 [2021-08-21 18:56:09,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20767 states. [2021-08-21 18:56:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20767 to 18574. [2021-08-21 18:56:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 18573 states have (on average 2.252678619501427) internal successors, (41839), 18573 states have internal predecessors, (41839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 41839 transitions. [2021-08-21 18:56:09,677 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 41839 transitions. Word has length 35 [2021-08-21 18:56:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:09,677 INFO L470 AbstractCegarLoop]: Abstraction has 18574 states and 41839 transitions. [2021-08-21 18:56:09,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 41839 transitions. [2021-08-21 18:56:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:09,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:09,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:09,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 18:56:09,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:09,912 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1815715140, now seen corresponding path program 3 times [2021-08-21 18:56:09,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:09,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170247223] [2021-08-21 18:56:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:09,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:09,967 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 18:56:09,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:09,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170247223] [2021-08-21 18:56:09,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170247223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:09,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929779928] [2021-08-21 18:56:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:09,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:09,969 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 18:56:09,969 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 18:56:11,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:12,162 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 18:56:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929779928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:12,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:12,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:12,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591519897] [2021-08-21 18:56:12,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:12,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:12,163 INFO L87 Difference]: Start difference. First operand 18574 states and 41839 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:12,293 INFO L93 Difference]: Finished difference Result 20778 states and 46620 transitions. [2021-08-21 18:56:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:12,327 INFO L225 Difference]: With dead ends: 20778 [2021-08-21 18:56:12,328 INFO L226 Difference]: Without dead ends: 20769 [2021-08-21 18:56:12,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-08-21 18:56:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 18612. [2021-08-21 18:56:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18612 states, 18611 states have (on average 2.2576970608779754) internal successors, (42018), 18611 states have internal predecessors, (42018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18612 states to 18612 states and 42018 transitions. [2021-08-21 18:56:12,656 INFO L78 Accepts]: Start accepts. Automaton has 18612 states and 42018 transitions. Word has length 35 [2021-08-21 18:56:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:12,657 INFO L470 AbstractCegarLoop]: Abstraction has 18612 states and 42018 transitions. [2021-08-21 18:56:12,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 18612 states and 42018 transitions. [2021-08-21 18:56:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:12,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:12,683 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:12,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 18:56:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-08-21 18:56:12,883 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:12,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1449327044, now seen corresponding path program 3 times [2021-08-21 18:56:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:12,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746240829] [2021-08-21 18:56:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:12,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:12,932 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 18:56:12,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746240829] [2021-08-21 18:56:12,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746240829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398538726] [2021-08-21 18:56:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:12,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:12,933 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 18:56:12,934 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 18:56:14,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:15,122 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 18:56:15,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398538726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:15,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:15,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:15,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786195870] [2021-08-21 18:56:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:15,123 INFO L87 Difference]: Start difference. First operand 18612 states and 42018 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:15,247 INFO L93 Difference]: Finished difference Result 20641 states and 46245 transitions. [2021-08-21 18:56:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:15,280 INFO L225 Difference]: With dead ends: 20641 [2021-08-21 18:56:15,280 INFO L226 Difference]: Without dead ends: 20632 [2021-08-21 18:56:15,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20632 states. [2021-08-21 18:56:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20632 to 18631. [2021-08-21 18:56:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18631 states, 18630 states have (on average 2.259957058507783) internal successors, (42103), 18630 states have internal predecessors, (42103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 42103 transitions. [2021-08-21 18:56:15,534 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 42103 transitions. Word has length 35 [2021-08-21 18:56:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 18631 states and 42103 transitions. [2021-08-21 18:56:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 42103 transitions. [2021-08-21 18:56:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:15,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:15,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:15,581 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 18:56:15,760 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,SelfDestructingSolverStorable161 [2021-08-21 18:56:15,760 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:15,760 INFO L82 PathProgramCache]: Analyzing trace with hash 195595408, now seen corresponding path program 3 times [2021-08-21 18:56:15,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:15,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850652399] [2021-08-21 18:56:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:15,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:15,813 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 18:56:15,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850652399] [2021-08-21 18:56:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850652399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413122967] [2021-08-21 18:56:15,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:15,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:15,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:15,814 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 18:56:15,815 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 18:56:17,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:17,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:17,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:18,039 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 18:56:18,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413122967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:18,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:18,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:18,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935522352] [2021-08-21 18:56:18,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:18,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:18,040 INFO L87 Difference]: Start difference. First operand 18631 states and 42103 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:18,162 INFO L93 Difference]: Finished difference Result 20787 states and 46432 transitions. [2021-08-21 18:56:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:18,196 INFO L225 Difference]: With dead ends: 20787 [2021-08-21 18:56:18,196 INFO L226 Difference]: Without dead ends: 20774 [2021-08-21 18:56:18,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20774 states. [2021-08-21 18:56:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20774 to 18656. [2021-08-21 18:56:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18656 states, 18655 states have (on average 2.2620745108549984) internal successors, (42199), 18655 states have internal predecessors, (42199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18656 states to 18656 states and 42199 transitions. [2021-08-21 18:56:18,447 INFO L78 Accepts]: Start accepts. Automaton has 18656 states and 42199 transitions. Word has length 35 [2021-08-21 18:56:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:18,447 INFO L470 AbstractCegarLoop]: Abstraction has 18656 states and 42199 transitions. [2021-08-21 18:56:18,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 18656 states and 42199 transitions. [2021-08-21 18:56:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:18,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:18,473 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 18:56:18,496 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 18:56:18,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:18,677 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1652743056, now seen corresponding path program 3 times [2021-08-21 18:56:18,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:18,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608825888] [2021-08-21 18:56:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:18,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:18,731 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 18:56:18,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:18,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608825888] [2021-08-21 18:56:18,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608825888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:18,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412826848] [2021-08-21 18:56:18,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:18,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:18,732 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 18:56:18,733 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 18:56:20,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:20,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:21,002 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 18:56:21,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412826848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:21,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:21,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:21,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721637930] [2021-08-21 18:56:21,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:21,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:21,003 INFO L87 Difference]: Start difference. First operand 18656 states and 42199 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:21,133 INFO L93 Difference]: Finished difference Result 20967 states and 47230 transitions. [2021-08-21 18:56:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:21,167 INFO L225 Difference]: With dead ends: 20967 [2021-08-21 18:56:21,167 INFO L226 Difference]: Without dead ends: 20958 [2021-08-21 18:56:21,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20958 states. [2021-08-21 18:56:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20958 to 18717. [2021-08-21 18:56:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18717 states, 18716 states have (on average 2.2668839495618722) internal successors, (42427), 18716 states have internal predecessors, (42427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18717 states to 18717 states and 42427 transitions. [2021-08-21 18:56:21,416 INFO L78 Accepts]: Start accepts. Automaton has 18717 states and 42427 transitions. Word has length 35 [2021-08-21 18:56:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 18717 states and 42427 transitions. [2021-08-21 18:56:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18717 states and 42427 transitions. [2021-08-21 18:56:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:21,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:21,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:21,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 18:56:21,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:21,657 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -676958268, now seen corresponding path program 5 times [2021-08-21 18:56:21,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:21,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238320537] [2021-08-21 18:56:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:21,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:21,708 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 18:56:21,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:21,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238320537] [2021-08-21 18:56:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238320537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:21,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638462392] [2021-08-21 18:56:21,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:21,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:21,714 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 18:56:21,715 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 18:56:23,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:24,064 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 18:56:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638462392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:24,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:24,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:24,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557949981] [2021-08-21 18:56:24,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:24,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:24,065 INFO L87 Difference]: Start difference. First operand 18717 states and 42427 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:24,208 INFO L93 Difference]: Finished difference Result 20559 states and 46544 transitions. [2021-08-21 18:56:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:24,243 INFO L225 Difference]: With dead ends: 20559 [2021-08-21 18:56:24,243 INFO L226 Difference]: Without dead ends: 20550 [2021-08-21 18:56:24,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20550 states. [2021-08-21 18:56:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20550 to 18787. [2021-08-21 18:56:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18787 states, 18786 states have (on average 2.2776003406792293) internal successors, (42787), 18786 states have internal predecessors, (42787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18787 states to 18787 states and 42787 transitions. [2021-08-21 18:56:24,496 INFO L78 Accepts]: Start accepts. Automaton has 18787 states and 42787 transitions. Word has length 35 [2021-08-21 18:56:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:24,496 INFO L470 AbstractCegarLoop]: Abstraction has 18787 states and 42787 transitions. [2021-08-21 18:56:24,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 18787 states and 42787 transitions. [2021-08-21 18:56:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:24,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:24,522 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 18:56:24,545 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 18:56:24,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:24,724 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:24,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1256487232, now seen corresponding path program 6 times [2021-08-21 18:56:24,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:24,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913195001] [2021-08-21 18:56:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:24,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:24,780 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 18:56:24,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:24,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913195001] [2021-08-21 18:56:24,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913195001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:24,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121260250] [2021-08-21 18:56:24,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:24,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:24,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:24,782 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 18:56:24,782 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 18:56:26,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:56:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:27,091 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 18:56:27,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121260250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:27,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:27,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:27,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827814196] [2021-08-21 18:56:27,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:27,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:27,092 INFO L87 Difference]: Start difference. First operand 18787 states and 42787 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:27,243 INFO L93 Difference]: Finished difference Result 20540 states and 46626 transitions. [2021-08-21 18:56:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:27,277 INFO L225 Difference]: With dead ends: 20540 [2021-08-21 18:56:27,277 INFO L226 Difference]: Without dead ends: 20531 [2021-08-21 18:56:27,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20531 states. [2021-08-21 18:56:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20531 to 18822. [2021-08-21 18:56:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18822 states, 18821 states have (on average 2.2831943042346317) internal successors, (42972), 18821 states have internal predecessors, (42972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18822 states to 18822 states and 42972 transitions. [2021-08-21 18:56:27,535 INFO L78 Accepts]: Start accepts. Automaton has 18822 states and 42972 transitions. Word has length 35 [2021-08-21 18:56:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:27,536 INFO L470 AbstractCegarLoop]: Abstraction has 18822 states and 42972 transitions. [2021-08-21 18:56:27,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18822 states and 42972 transitions. [2021-08-21 18:56:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:27,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:27,567 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 18:56:27,592 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 18:56:27,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:27,772 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash -459556428, now seen corresponding path program 3 times [2021-08-21 18:56:27,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:27,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690515520] [2021-08-21 18:56:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:27,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:27,824 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 18:56:27,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690515520] [2021-08-21 18:56:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690515520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823258804] [2021-08-21 18:56:27,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:27,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:27,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:27,825 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 18:56:27,825 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 18:56:29,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:30,164 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 18:56:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823258804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:30,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5624081] [2021-08-21 18:56:30,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:30,165 INFO L87 Difference]: Start difference. First operand 18822 states and 42972 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:30,305 INFO L93 Difference]: Finished difference Result 20989 states and 47772 transitions. [2021-08-21 18:56:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:30,343 INFO L225 Difference]: With dead ends: 20989 [2021-08-21 18:56:30,343 INFO L226 Difference]: Without dead ends: 20980 [2021-08-21 18:56:30,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20980 states. [2021-08-21 18:56:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20980 to 18868. [2021-08-21 18:56:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18868 states, 18867 states have (on average 2.2894471829119625) internal successors, (43195), 18867 states have internal predecessors, (43195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18868 states to 18868 states and 43195 transitions. [2021-08-21 18:56:30,616 INFO L78 Accepts]: Start accepts. Automaton has 18868 states and 43195 transitions. Word has length 35 [2021-08-21 18:56:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:30,616 INFO L470 AbstractCegarLoop]: Abstraction has 18868 states and 43195 transitions. [2021-08-21 18:56:30,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 18868 states and 43195 transitions. [2021-08-21 18:56:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:30,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:30,642 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:30,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 18:56:30,842 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,SelfDestructingSolverStorable166 [2021-08-21 18:56:30,842 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash 733799104, now seen corresponding path program 3 times [2021-08-21 18:56:30,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:30,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548940894] [2021-08-21 18:56:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:30,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:30,905 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 18:56:30,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:30,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548940894] [2021-08-21 18:56:30,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548940894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:30,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663619594] [2021-08-21 18:56:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:30,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:30,906 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 18:56:30,907 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 18:56:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:33,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:33,305 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 18:56:33,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663619594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:33,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:33,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:33,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861516449] [2021-08-21 18:56:33,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:33,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:33,306 INFO L87 Difference]: Start difference. First operand 18868 states and 43195 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:33,436 INFO L93 Difference]: Finished difference Result 21050 states and 47917 transitions. [2021-08-21 18:56:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:33,471 INFO L225 Difference]: With dead ends: 21050 [2021-08-21 18:56:33,471 INFO L226 Difference]: Without dead ends: 21041 [2021-08-21 18:56:33,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21041 states. [2021-08-21 18:56:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21041 to 18905. [2021-08-21 18:56:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18905 states, 18904 states have (on average 2.29305966991113) internal successors, (43348), 18904 states have internal predecessors, (43348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18905 states to 18905 states and 43348 transitions. [2021-08-21 18:56:33,720 INFO L78 Accepts]: Start accepts. Automaton has 18905 states and 43348 transitions. Word has length 35 [2021-08-21 18:56:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:33,720 INFO L470 AbstractCegarLoop]: Abstraction has 18905 states and 43348 transitions. [2021-08-21 18:56:33,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 18905 states and 43348 transitions. [2021-08-21 18:56:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:33,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:33,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:33,769 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 18:56:33,946 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,SelfDestructingSolverStorable167 [2021-08-21 18:56:33,946 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2072889652, now seen corresponding path program 3 times [2021-08-21 18:56:33,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:33,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36564778] [2021-08-21 18:56:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:33,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:33,996 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 18:56:33,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:33,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36564778] [2021-08-21 18:56:33,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36564778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:33,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206522263] [2021-08-21 18:56:33,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:33,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:33,997 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 18:56:33,997 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 18:56:36,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:36,405 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 18:56:36,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206522263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:36,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:36,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:36,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582555455] [2021-08-21 18:56:36,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:36,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:36,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:36,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:36,406 INFO L87 Difference]: Start difference. First operand 18905 states and 43348 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:36,539 INFO L93 Difference]: Finished difference Result 21041 states and 48052 transitions. [2021-08-21 18:56:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:36,573 INFO L225 Difference]: With dead ends: 21041 [2021-08-21 18:56:36,573 INFO L226 Difference]: Without dead ends: 21032 [2021-08-21 18:56:36,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2021-08-21 18:56:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 18934. [2021-08-21 18:56:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 18933 states have (on average 2.297100301061638) internal successors, (43491), 18933 states have internal predecessors, (43491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 43491 transitions. [2021-08-21 18:56:36,832 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 43491 transitions. Word has length 35 [2021-08-21 18:56:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:36,832 INFO L470 AbstractCegarLoop]: Abstraction has 18934 states and 43491 transitions. [2021-08-21 18:56:36,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 43491 transitions. [2021-08-21 18:56:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:36,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:36,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:36,881 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 18:56:37,082 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,SelfDestructingSolverStorable168 [2021-08-21 18:56:37,082 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1855689548, now seen corresponding path program 3 times [2021-08-21 18:56:37,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:37,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318243667] [2021-08-21 18:56:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:37,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:37,132 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 18:56:37,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:37,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318243667] [2021-08-21 18:56:37,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318243667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:37,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039362119] [2021-08-21 18:56:37,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:37,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:37,133 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 18:56:37,134 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 18:56:39,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:39,537 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 18:56:39,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039362119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:39,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:39,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:39,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904612196] [2021-08-21 18:56:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:39,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:39,538 INFO L87 Difference]: Start difference. First operand 18934 states and 43491 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:39,670 INFO L93 Difference]: Finished difference Result 20892 states and 47613 transitions. [2021-08-21 18:56:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:39,707 INFO L225 Difference]: With dead ends: 20892 [2021-08-21 18:56:39,707 INFO L226 Difference]: Without dead ends: 20883 [2021-08-21 18:56:39,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20883 states. [2021-08-21 18:56:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20883 to 18944. [2021-08-21 18:56:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18944 states, 18943 states have (on average 2.2984743704798607) internal successors, (43540), 18943 states have internal predecessors, (43540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18944 states to 18944 states and 43540 transitions. [2021-08-21 18:56:39,959 INFO L78 Accepts]: Start accepts. Automaton has 18944 states and 43540 transitions. Word has length 35 [2021-08-21 18:56:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:39,959 INFO L470 AbstractCegarLoop]: Abstraction has 18944 states and 43540 transitions. [2021-08-21 18:56:39,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 18944 states and 43540 transitions. [2021-08-21 18:56:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:39,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:39,985 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, 1, 1, 1] [2021-08-21 18:56:40,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:56:40,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 18:56:40,186 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash -210767096, now seen corresponding path program 3 times [2021-08-21 18:56:40,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:40,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194857371] [2021-08-21 18:56:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:40,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:40,240 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 18:56:40,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:40,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194857371] [2021-08-21 18:56:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194857371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:40,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610613319] [2021-08-21 18:56:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:40,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:40,241 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 18:56:40,241 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 18:56:42,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:42,759 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 18:56:42,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610613319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:42,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:42,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:42,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387390860] [2021-08-21 18:56:42,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:42,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:42,760 INFO L87 Difference]: Start difference. First operand 18944 states and 43540 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:42,886 INFO L93 Difference]: Finished difference Result 21029 states and 47762 transitions. [2021-08-21 18:56:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:42,921 INFO L225 Difference]: With dead ends: 21029 [2021-08-21 18:56:42,921 INFO L226 Difference]: Without dead ends: 21016 [2021-08-21 18:56:42,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21016 states. [2021-08-21 18:56:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21016 to 18960. [2021-08-21 18:56:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18960 states, 18959 states have (on average 2.300121314415317) internal successors, (43608), 18959 states have internal predecessors, (43608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18960 states to 18960 states and 43608 transitions. [2021-08-21 18:56:43,177 INFO L78 Accepts]: Start accepts. Automaton has 18960 states and 43608 transitions. Word has length 35 [2021-08-21 18:56:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:43,177 INFO L470 AbstractCegarLoop]: Abstraction has 18960 states and 43608 transitions. [2021-08-21 18:56:43,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 18960 states and 43608 transitions. [2021-08-21 18:56:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:43,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:43,203 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:43,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:56:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:43,404 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1246380552, now seen corresponding path program 4 times [2021-08-21 18:56:43,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:43,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059602829] [2021-08-21 18:56:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:43,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:43,459 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 18:56:43,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059602829] [2021-08-21 18:56:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059602829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901018403] [2021-08-21 18:56:43,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:43,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:43,461 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 18:56:43,461 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 18:56:45,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:45,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:45,911 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 18:56:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901018403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:45,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:45,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:45,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59799619] [2021-08-21 18:56:45,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:45,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:45,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:45,912 INFO L87 Difference]: Start difference. First operand 18960 states and 43608 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:46,049 INFO L93 Difference]: Finished difference Result 21190 states and 48545 transitions. [2021-08-21 18:56:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:46,083 INFO L225 Difference]: With dead ends: 21190 [2021-08-21 18:56:46,083 INFO L226 Difference]: Without dead ends: 21181 [2021-08-21 18:56:46,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21181 states. [2021-08-21 18:56:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21181 to 19002. [2021-08-21 18:56:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19002 states, 19001 states have (on average 2.304194516078101) internal successors, (43782), 19001 states have internal predecessors, (43782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19002 states to 19002 states and 43782 transitions. [2021-08-21 18:56:46,336 INFO L78 Accepts]: Start accepts. Automaton has 19002 states and 43782 transitions. Word has length 35 [2021-08-21 18:56:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:46,336 INFO L470 AbstractCegarLoop]: Abstraction has 19002 states and 43782 transitions. [2021-08-21 18:56:46,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 19002 states and 43782 transitions. [2021-08-21 18:56:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:46,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:46,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:46,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:56:46,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,562 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1323175612, now seen corresponding path program 5 times [2021-08-21 18:56:46,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:46,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021821206] [2021-08-21 18:56:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:46,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:46,613 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 18:56:46,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:46,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021821206] [2021-08-21 18:56:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021821206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:46,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344062783] [2021-08-21 18:56:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:46,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:46,614 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 18:56:46,614 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 18:56:48,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:48,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:49,064 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 18:56:49,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344062783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:49,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:49,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:49,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727724711] [2021-08-21 18:56:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:49,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:49,065 INFO L87 Difference]: Start difference. First operand 19002 states and 43782 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:49,202 INFO L93 Difference]: Finished difference Result 20866 states and 47911 transitions. [2021-08-21 18:56:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:49,235 INFO L225 Difference]: With dead ends: 20866 [2021-08-21 18:56:49,236 INFO L226 Difference]: Without dead ends: 20857 [2021-08-21 18:56:49,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-08-21 18:56:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 19047. [2021-08-21 18:56:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19047 states, 19046 states have (on average 2.308988764044944) internal successors, (43977), 19046 states have internal predecessors, (43977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19047 states to 19047 states and 43977 transitions. [2021-08-21 18:56:49,488 INFO L78 Accepts]: Start accepts. Automaton has 19047 states and 43977 transitions. Word has length 35 [2021-08-21 18:56:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:49,489 INFO L470 AbstractCegarLoop]: Abstraction has 19047 states and 43977 transitions. [2021-08-21 18:56:49,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 19047 states and 43977 transitions. [2021-08-21 18:56:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:49,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:49,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:49,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:56:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:49,718 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1902704576, now seen corresponding path program 6 times [2021-08-21 18:56:49,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:49,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673825937] [2021-08-21 18:56:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:49,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:49,770 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 18:56:49,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:49,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673825937] [2021-08-21 18:56:49,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673825937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:49,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688274912] [2021-08-21 18:56:49,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:49,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:49,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:49,771 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 18:56:49,772 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 18:56:52,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:56:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:52,393 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 18:56:52,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688274912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:52,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:52,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:52,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127218450] [2021-08-21 18:56:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:52,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:52,394 INFO L87 Difference]: Start difference. First operand 19047 states and 43977 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:52,542 INFO L93 Difference]: Finished difference Result 20797 states and 47827 transitions. [2021-08-21 18:56:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:52,577 INFO L225 Difference]: With dead ends: 20797 [2021-08-21 18:56:52,577 INFO L226 Difference]: Without dead ends: 20788 [2021-08-21 18:56:52,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:56:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20788 states. [2021-08-21 18:56:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20788 to 19082. [2021-08-21 18:56:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19082 states, 19081 states have (on average 2.313400765159059) internal successors, (44142), 19081 states have internal predecessors, (44142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19082 states to 19082 states and 44142 transitions. [2021-08-21 18:56:52,837 INFO L78 Accepts]: Start accepts. Automaton has 19082 states and 44142 transitions. Word has length 35 [2021-08-21 18:56:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 19082 states and 44142 transitions. [2021-08-21 18:56:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 19082 states and 44142 transitions. [2021-08-21 18:56:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:52,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:52,865 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 18:56:52,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:56:53,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:53,066 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1655755208, now seen corresponding path program 3 times [2021-08-21 18:56:53,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:53,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748452895] [2021-08-21 18:56:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:53,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:53,120 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 18:56:53,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:53,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748452895] [2021-08-21 18:56:53,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748452895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:53,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524753551] [2021-08-21 18:56:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:53,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:53,121 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 18:56:53,122 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 18:56:55,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:55,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:55,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:55,677 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 18:56:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524753551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:55,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:55,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:55,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929043906] [2021-08-21 18:56:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:55,678 INFO L87 Difference]: Start difference. First operand 19082 states and 44142 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:55,813 INFO L93 Difference]: Finished difference Result 21341 states and 49164 transitions. [2021-08-21 18:56:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:55,849 INFO L225 Difference]: With dead ends: 21341 [2021-08-21 18:56:55,849 INFO L226 Difference]: Without dead ends: 21332 [2021-08-21 18:56:55,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:56:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21332 states. [2021-08-21 18:56:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21332 to 19161. [2021-08-21 18:56:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19161 states, 19160 states have (on average 2.3241127348643005) internal successors, (44530), 19160 states have internal predecessors, (44530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19161 states to 19161 states and 44530 transitions. [2021-08-21 18:56:56,117 INFO L78 Accepts]: Start accepts. Automaton has 19161 states and 44530 transitions. Word has length 35 [2021-08-21 18:56:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:56,117 INFO L470 AbstractCegarLoop]: Abstraction has 19161 states and 44530 transitions. [2021-08-21 18:56:56,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19161 states and 44530 transitions. [2021-08-21 18:56:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:56,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:56,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:56,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:56:56,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:56,344 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:56,344 INFO L82 PathProgramCache]: Analyzing trace with hash -462399676, now seen corresponding path program 3 times [2021-08-21 18:56:56,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:56,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418745626] [2021-08-21 18:56:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:56,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:56,405 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 18:56:56,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:56,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418745626] [2021-08-21 18:56:56,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418745626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:56,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210866703] [2021-08-21 18:56:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:56,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:56,406 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 18:56:56,407 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 18:56:58,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:58,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:56:58,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:58,951 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 18:56:58,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210866703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:58,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:58,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:56:58,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591518948] [2021-08-21 18:56:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:56:58,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:56:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:56:58,952 INFO L87 Difference]: Start difference. First operand 19161 states and 44530 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:59,096 INFO L93 Difference]: Finished difference Result 21412 states and 49374 transitions. [2021-08-21 18:56:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:56:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:59,132 INFO L225 Difference]: With dead ends: 21412 [2021-08-21 18:56:59,132 INFO L226 Difference]: Without dead ends: 21403 [2021-08-21 18:56:59,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:56:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21403 states. [2021-08-21 18:56:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21403 to 19212. [2021-08-21 18:56:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19212 states, 19211 states have (on average 2.3296548852220083) internal successors, (44755), 19211 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19212 states to 19212 states and 44755 transitions. [2021-08-21 18:56:59,396 INFO L78 Accepts]: Start accepts. Automaton has 19212 states and 44755 transitions. Word has length 35 [2021-08-21 18:56:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:59,396 INFO L470 AbstractCegarLoop]: Abstraction has 19212 states and 44755 transitions. [2021-08-21 18:56:59,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:56:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19212 states and 44755 transitions. [2021-08-21 18:56:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:56:59,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:59,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:59,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:56:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:59,623 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:56:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash 876690872, now seen corresponding path program 3 times [2021-08-21 18:56:59,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:59,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338542631] [2021-08-21 18:56:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:59,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:59,674 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 18:56:59,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:59,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338542631] [2021-08-21 18:56:59,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338542631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:59,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191688713] [2021-08-21 18:56:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:59,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:59,675 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 18:56:59,676 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 18:57:02,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:57:02,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:02,305 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 18:57:02,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191688713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:02,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:02,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671405160] [2021-08-21 18:57:02,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:02,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:02,306 INFO L87 Difference]: Start difference. First operand 19212 states and 44755 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:02,442 INFO L93 Difference]: Finished difference Result 21413 states and 49544 transitions. [2021-08-21 18:57:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:02,477 INFO L225 Difference]: With dead ends: 21413 [2021-08-21 18:57:02,477 INFO L226 Difference]: Without dead ends: 21404 [2021-08-21 18:57:02,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21404 states. [2021-08-21 18:57:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21404 to 19250. [2021-08-21 18:57:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19250 states, 19249 states have (on average 2.334770637435711) internal successors, (44942), 19249 states have internal predecessors, (44942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19250 states to 19250 states and 44942 transitions. [2021-08-21 18:57:02,744 INFO L78 Accepts]: Start accepts. Automaton has 19250 states and 44942 transitions. Word has length 35 [2021-08-21 18:57:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:02,744 INFO L470 AbstractCegarLoop]: Abstraction has 19250 states and 44942 transitions. [2021-08-21 18:57:02,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 19250 states and 44942 transitions. [2021-08-21 18:57:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:02,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:02,770 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, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:02,792 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 18:57:02,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:02,970 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:02,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1243078968, now seen corresponding path program 3 times [2021-08-21 18:57:02,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:02,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834396143] [2021-08-21 18:57:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:02,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:03,020 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 18:57:03,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:03,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834396143] [2021-08-21 18:57:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834396143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:03,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446879479] [2021-08-21 18:57:03,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:03,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:03,022 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 18:57:03,022 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 18:57:05,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:57:05,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:05,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:05,609 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 18:57:05,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446879479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:05,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:05,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:05,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977417829] [2021-08-21 18:57:05,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:05,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:05,610 INFO L87 Difference]: Start difference. First operand 19250 states and 44942 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:05,753 INFO L93 Difference]: Finished difference Result 21274 states and 49162 transitions. [2021-08-21 18:57:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:05,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:05,794 INFO L225 Difference]: With dead ends: 21274 [2021-08-21 18:57:05,794 INFO L226 Difference]: Without dead ends: 21265 [2021-08-21 18:57:05,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21265 states. [2021-08-21 18:57:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21265 to 19269. [2021-08-21 18:57:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19269 states, 19268 states have (on average 2.337087398795931) internal successors, (45031), 19268 states have internal predecessors, (45031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19269 states to 19269 states and 45031 transitions. [2021-08-21 18:57:06,064 INFO L78 Accepts]: Start accepts. Automaton has 19269 states and 45031 transitions. Word has length 35 [2021-08-21 18:57:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 19269 states and 45031 transitions. [2021-08-21 18:57:06,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19269 states and 45031 transitions. [2021-08-21 18:57:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:06,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:06,093 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:06,119 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 18:57:06,294 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,SelfDestructingSolverStorable177 [2021-08-21 18:57:06,294 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1406965876, now seen corresponding path program 3 times [2021-08-21 18:57:06,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:06,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977179556] [2021-08-21 18:57:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:06,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:06,346 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 18:57:06,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:06,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977179556] [2021-08-21 18:57:06,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977179556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:06,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662587103] [2021-08-21 18:57:06,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:06,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:06,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:06,347 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 18:57:06,348 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 18:57:08,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:57:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:09,010 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 18:57:09,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662587103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:09,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:09,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:09,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340975341] [2021-08-21 18:57:09,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:09,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:09,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:09,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:09,011 INFO L87 Difference]: Start difference. First operand 19269 states and 45031 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:09,143 INFO L93 Difference]: Finished difference Result 21421 states and 49361 transitions. [2021-08-21 18:57:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:09,180 INFO L225 Difference]: With dead ends: 21421 [2021-08-21 18:57:09,180 INFO L226 Difference]: Without dead ends: 21408 [2021-08-21 18:57:09,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21408 states. [2021-08-21 18:57:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21408 to 19294. [2021-08-21 18:57:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19294 states, 19293 states have (on average 2.3393458767428603) internal successors, (45133), 19293 states have internal predecessors, (45133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19294 states to 19294 states and 45133 transitions. [2021-08-21 18:57:09,453 INFO L78 Accepts]: Start accepts. Automaton has 19294 states and 45133 transitions. Word has length 35 [2021-08-21 18:57:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:09,453 INFO L470 AbstractCegarLoop]: Abstraction has 19294 states and 45133 transitions. [2021-08-21 18:57:09,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19294 states and 45133 transitions. [2021-08-21 18:57:09,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:09,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:09,482 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:09,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:57:09,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 18:57:09,682 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 50181772, now seen corresponding path program 4 times [2021-08-21 18:57:09,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:09,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655290190] [2021-08-21 18:57:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:09,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:09,796 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 18:57:09,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:09,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655290190] [2021-08-21 18:57:09,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655290190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:09,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191901502] [2021-08-21 18:57:09,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:09,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:09,797 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 18:57:09,798 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 18:57:12,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:12,420 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 18:57:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191901502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:12,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:12,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595717141] [2021-08-21 18:57:12,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:12,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:12,421 INFO L87 Difference]: Start difference. First operand 19294 states and 45133 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:12,565 INFO L93 Difference]: Finished difference Result 21592 states and 50162 transitions. [2021-08-21 18:57:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:12,604 INFO L225 Difference]: With dead ends: 21592 [2021-08-21 18:57:12,604 INFO L226 Difference]: Without dead ends: 21583 [2021-08-21 18:57:12,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21583 states. [2021-08-21 18:57:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21583 to 19346. [2021-08-21 18:57:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19346 states, 19345 states have (on average 2.3447402429568363) internal successors, (45359), 19345 states have internal predecessors, (45359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19346 states to 19346 states and 45359 transitions. [2021-08-21 18:57:12,870 INFO L78 Accepts]: Start accepts. Automaton has 19346 states and 45359 transitions. Word has length 35 [2021-08-21 18:57:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:12,870 INFO L470 AbstractCegarLoop]: Abstraction has 19346 states and 45359 transitions. [2021-08-21 18:57:12,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 19346 states and 45359 transitions. [2021-08-21 18:57:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:12,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:12,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:12,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 18:57:13,098 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,SelfDestructingSolverStorable179 [2021-08-21 18:57:13,098 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1932205120, now seen corresponding path program 5 times [2021-08-21 18:57:13,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:13,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093827714] [2021-08-21 18:57:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:13,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:13,149 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 18:57:13,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:13,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093827714] [2021-08-21 18:57:13,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093827714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:13,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660621499] [2021-08-21 18:57:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:13,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:13,151 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 18:57:13,151 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 18:57:15,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:15,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:15,799 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 18:57:15,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660621499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:15,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:15,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:15,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153786344] [2021-08-21 18:57:15,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:15,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:15,800 INFO L87 Difference]: Start difference. First operand 19346 states and 45359 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:15,940 INFO L93 Difference]: Finished difference Result 21337 states and 49738 transitions. [2021-08-21 18:57:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:15,976 INFO L225 Difference]: With dead ends: 21337 [2021-08-21 18:57:15,976 INFO L226 Difference]: Without dead ends: 21328 [2021-08-21 18:57:15,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21328 states. [2021-08-21 18:57:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21328 to 19400. [2021-08-21 18:57:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19400 states, 19399 states have (on average 2.3505335326563226) internal successors, (45598), 19399 states have internal predecessors, (45598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19400 states to 19400 states and 45598 transitions. [2021-08-21 18:57:16,240 INFO L78 Accepts]: Start accepts. Automaton has 19400 states and 45598 transitions. Word has length 35 [2021-08-21 18:57:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 19400 states and 45598 transitions. [2021-08-21 18:57:16,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 19400 states and 45598 transitions. [2021-08-21 18:57:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:16,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:16,269 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 18:57:16,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:57:16,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:16,469 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1352676156, now seen corresponding path program 6 times [2021-08-21 18:57:16,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:16,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326455984] [2021-08-21 18:57:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:16,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:16,521 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 18:57:16,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:16,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326455984] [2021-08-21 18:57:16,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326455984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:16,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499643452] [2021-08-21 18:57:16,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:16,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:16,523 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 18:57:16,523 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 18:57:19,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:19,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:19,167 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 18:57:19,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499643452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:19,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:19,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206253423] [2021-08-21 18:57:19,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:19,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:19,168 INFO L87 Difference]: Start difference. First operand 19400 states and 45598 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:19,315 INFO L93 Difference]: Finished difference Result 21252 states and 49634 transitions. [2021-08-21 18:57:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:19,353 INFO L225 Difference]: With dead ends: 21252 [2021-08-21 18:57:19,353 INFO L226 Difference]: Without dead ends: 21243 [2021-08-21 18:57:19,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21243 states. [2021-08-21 18:57:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21243 to 19442. [2021-08-21 18:57:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19442 states, 19441 states have (on average 2.3556915796512525) internal successors, (45797), 19441 states have internal predecessors, (45797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19442 states to 19442 states and 45797 transitions. [2021-08-21 18:57:19,684 INFO L78 Accepts]: Start accepts. Automaton has 19442 states and 45797 transitions. Word has length 35 [2021-08-21 18:57:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:19,684 INFO L470 AbstractCegarLoop]: Abstraction has 19442 states and 45797 transitions. [2021-08-21 18:57:19,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19442 states and 45797 transitions. [2021-08-21 18:57:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:19,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:19,711 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, 1, 1, 1] [2021-08-21 18:57:19,734 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 18:57:19,912 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,SelfDestructingSolverStorable181 [2021-08-21 18:57:19,912 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 422815912, now seen corresponding path program 4 times [2021-08-21 18:57:19,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:19,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158501830] [2021-08-21 18:57:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:19,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:19,963 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 18:57:19,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:19,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158501830] [2021-08-21 18:57:19,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158501830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944210157] [2021-08-21 18:57:19,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:19,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:19,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:19,964 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 18:57:19,965 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 18:57:22,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:22,696 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 18:57:22,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944210157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:22,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:22,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420964070] [2021-08-21 18:57:22,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:22,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:22,697 INFO L87 Difference]: Start difference. First operand 19442 states and 45797 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:22,836 INFO L93 Difference]: Finished difference Result 21602 states and 50589 transitions. [2021-08-21 18:57:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:22,876 INFO L225 Difference]: With dead ends: 21602 [2021-08-21 18:57:22,877 INFO L226 Difference]: Without dead ends: 21593 [2021-08-21 18:57:22,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:57:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21593 states. [2021-08-21 18:57:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21593 to 19499. [2021-08-21 18:57:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19499 states, 19498 states have (on average 2.3627551543748075) internal successors, (46069), 19498 states have internal predecessors, (46069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19499 states to 19499 states and 46069 transitions. [2021-08-21 18:57:23,165 INFO L78 Accepts]: Start accepts. Automaton has 19499 states and 46069 transitions. Word has length 35 [2021-08-21 18:57:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:23,165 INFO L470 AbstractCegarLoop]: Abstraction has 19499 states and 46069 transitions. [2021-08-21 18:57:23,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 19499 states and 46069 transitions. [2021-08-21 18:57:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:23,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:23,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:23,214 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 18:57:23,392 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,SelfDestructingSolverStorable182 [2021-08-21 18:57:23,392 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1673396012, now seen corresponding path program 4 times [2021-08-21 18:57:23,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:23,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919676814] [2021-08-21 18:57:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:23,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:23,444 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 18:57:23,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:23,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919676814] [2021-08-21 18:57:23,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919676814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:23,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256340152] [2021-08-21 18:57:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:23,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:23,445 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 18:57:23,446 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 18:57:26,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:26,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:26,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:26,205 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 18:57:26,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256340152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:26,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:26,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:26,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47366578] [2021-08-21 18:57:26,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:26,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:26,206 INFO L87 Difference]: Start difference. First operand 19499 states and 46069 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:26,358 INFO L93 Difference]: Finished difference Result 21736 states and 50980 transitions. [2021-08-21 18:57:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:26,398 INFO L225 Difference]: With dead ends: 21736 [2021-08-21 18:57:26,399 INFO L226 Difference]: Without dead ends: 21727 [2021-08-21 18:57:26,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21727 states. [2021-08-21 18:57:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21727 to 19564. [2021-08-21 18:57:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19564 states, 19563 states have (on average 2.3702397382814495) internal successors, (46369), 19563 states have internal predecessors, (46369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19564 states to 19564 states and 46369 transitions. [2021-08-21 18:57:26,671 INFO L78 Accepts]: Start accepts. Automaton has 19564 states and 46369 transitions. Word has length 35 [2021-08-21 18:57:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:26,671 INFO L470 AbstractCegarLoop]: Abstraction has 19564 states and 46369 transitions. [2021-08-21 18:57:26,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19564 states and 46369 transitions. [2021-08-21 18:57:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:26,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:26,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:26,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 18:57:26,900 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1227620564, now seen corresponding path program 1 times [2021-08-21 18:57:26,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:26,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293086573] [2021-08-21 18:57:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:26,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:26,951 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 18:57:26,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293086573] [2021-08-21 18:57:26,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293086573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:26,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:26,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:26,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256886190] [2021-08-21 18:57:26,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:26,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:26,952 INFO L87 Difference]: Start difference. First operand 19564 states and 46369 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:27,079 INFO L93 Difference]: Finished difference Result 22188 states and 52259 transitions. [2021-08-21 18:57:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:27,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:27,118 INFO L225 Difference]: With dead ends: 22188 [2021-08-21 18:57:27,118 INFO L226 Difference]: Without dead ends: 22179 [2021-08-21 18:57:27,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2021-08-21 18:57:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 19682. [2021-08-21 18:57:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19682 states, 19681 states have (on average 2.3802144199989836) internal successors, (46845), 19681 states have internal predecessors, (46845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19682 states to 19682 states and 46845 transitions. [2021-08-21 18:57:27,410 INFO L78 Accepts]: Start accepts. Automaton has 19682 states and 46845 transitions. Word has length 35 [2021-08-21 18:57:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 19682 states and 46845 transitions. [2021-08-21 18:57:27,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 19682 states and 46845 transitions. [2021-08-21 18:57:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:27,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:27,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:27,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-08-21 18:57:27,439 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash -861232468, now seen corresponding path program 1 times [2021-08-21 18:57:27,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:27,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330284841] [2021-08-21 18:57:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:27,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:27,490 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 18:57:27,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:27,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330284841] [2021-08-21 18:57:27,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330284841] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:27,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:27,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:27,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395047663] [2021-08-21 18:57:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:27,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:27,491 INFO L87 Difference]: Start difference. First operand 19682 states and 46845 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:27,616 INFO L93 Difference]: Finished difference Result 22116 states and 52053 transitions. [2021-08-21 18:57:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:27,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:27,659 INFO L225 Difference]: With dead ends: 22116 [2021-08-21 18:57:27,659 INFO L226 Difference]: Without dead ends: 22107 [2021-08-21 18:57:27,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22107 states. [2021-08-21 18:57:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22107 to 19761. [2021-08-21 18:57:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19761 states, 19760 states have (on average 2.3846153846153846) internal successors, (47120), 19760 states have internal predecessors, (47120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19761 states to 19761 states and 47120 transitions. [2021-08-21 18:57:28,072 INFO L78 Accepts]: Start accepts. Automaton has 19761 states and 47120 transitions. Word has length 35 [2021-08-21 18:57:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:28,072 INFO L470 AbstractCegarLoop]: Abstraction has 19761 states and 47120 transitions. [2021-08-21 18:57:28,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19761 states and 47120 transitions. [2021-08-21 18:57:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:28,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:28,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:28,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-08-21 18:57:28,099 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash 783689984, now seen corresponding path program 1 times [2021-08-21 18:57:28,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:28,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3847175] [2021-08-21 18:57:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:28,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:28,149 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 18:57:28,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:28,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3847175] [2021-08-21 18:57:28,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3847175] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:28,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:28,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246384567] [2021-08-21 18:57:28,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:28,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,150 INFO L87 Difference]: Start difference. First operand 19761 states and 47120 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:28,271 INFO L93 Difference]: Finished difference Result 22313 states and 52375 transitions. [2021-08-21 18:57:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:28,320 INFO L225 Difference]: With dead ends: 22313 [2021-08-21 18:57:28,320 INFO L226 Difference]: Without dead ends: 22300 [2021-08-21 18:57:28,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22300 states. [2021-08-21 18:57:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22300 to 19842. [2021-08-21 18:57:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 19841 states have (on average 2.3857668464291115) internal successors, (47336), 19841 states have internal predecessors, (47336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 47336 transitions. [2021-08-21 18:57:28,614 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 47336 transitions. Word has length 35 [2021-08-21 18:57:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:28,614 INFO L470 AbstractCegarLoop]: Abstraction has 19842 states and 47336 transitions. [2021-08-21 18:57:28,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 47336 transitions. [2021-08-21 18:57:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:28,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:28,643 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 18:57:28,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-08-21 18:57:28,643 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2054129664, now seen corresponding path program 1 times [2021-08-21 18:57:28,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:28,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231701560] [2021-08-21 18:57:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:28,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:28,693 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 18:57:28,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:28,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231701560] [2021-08-21 18:57:28,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231701560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:28,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:28,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:28,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162449688] [2021-08-21 18:57:28,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:28,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,694 INFO L87 Difference]: Start difference. First operand 19842 states and 47336 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:28,829 INFO L93 Difference]: Finished difference Result 22540 states and 53322 transitions. [2021-08-21 18:57:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:28,869 INFO L225 Difference]: With dead ends: 22540 [2021-08-21 18:57:28,870 INFO L226 Difference]: Without dead ends: 22531 [2021-08-21 18:57:28,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22531 states. [2021-08-21 18:57:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22531 to 19951. [2021-08-21 18:57:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19951 states, 19950 states have (on average 2.3929824561403508) internal successors, (47740), 19950 states have internal predecessors, (47740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19951 states to 19951 states and 47740 transitions. [2021-08-21 18:57:29,153 INFO L78 Accepts]: Start accepts. Automaton has 19951 states and 47740 transitions. Word has length 35 [2021-08-21 18:57:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:29,153 INFO L470 AbstractCegarLoop]: Abstraction has 19951 states and 47740 transitions. [2021-08-21 18:57:29,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 19951 states and 47740 transitions. [2021-08-21 18:57:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:29,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:29,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:29,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-08-21 18:57:29,182 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash 329037752, now seen corresponding path program 1 times [2021-08-21 18:57:29,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:29,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878824119] [2021-08-21 18:57:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:29,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:29,233 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 18:57:29,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:29,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878824119] [2021-08-21 18:57:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878824119] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:29,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514921630] [2021-08-21 18:57:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:29,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:29,234 INFO L87 Difference]: Start difference. First operand 19951 states and 47740 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:29,387 INFO L93 Difference]: Finished difference Result 22352 states and 52924 transitions. [2021-08-21 18:57:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:29,428 INFO L225 Difference]: With dead ends: 22352 [2021-08-21 18:57:29,428 INFO L226 Difference]: Without dead ends: 22343 [2021-08-21 18:57:29,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2021-08-21 18:57:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 20032. [2021-08-21 18:57:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20032 states, 20031 states have (on average 2.3984324297339126) internal successors, (48043), 20031 states have internal predecessors, (48043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20032 states to 20032 states and 48043 transitions. [2021-08-21 18:57:29,722 INFO L78 Accepts]: Start accepts. Automaton has 20032 states and 48043 transitions. Word has length 35 [2021-08-21 18:57:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:29,722 INFO L470 AbstractCegarLoop]: Abstraction has 20032 states and 48043 transitions. [2021-08-21 18:57:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20032 states and 48043 transitions. [2021-08-21 18:57:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:29,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:29,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:29,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-08-21 18:57:29,751 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1973960204, now seen corresponding path program 1 times [2021-08-21 18:57:29,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:29,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545488571] [2021-08-21 18:57:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:29,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:29,801 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 18:57:29,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:29,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545488571] [2021-08-21 18:57:29,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545488571] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:29,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:29,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:29,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611472357] [2021-08-21 18:57:29,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:29,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:29,802 INFO L87 Difference]: Start difference. First operand 20032 states and 48043 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:29,928 INFO L93 Difference]: Finished difference Result 22556 states and 53281 transitions. [2021-08-21 18:57:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:29,971 INFO L225 Difference]: With dead ends: 22556 [2021-08-21 18:57:29,972 INFO L226 Difference]: Without dead ends: 22543 [2021-08-21 18:57:29,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22543 states. [2021-08-21 18:57:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22543 to 20111. [2021-08-21 18:57:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20111 states, 20110 states have (on average 2.40014917951268) internal successors, (48267), 20110 states have internal predecessors, (48267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20111 states to 20111 states and 48267 transitions. [2021-08-21 18:57:30,266 INFO L78 Accepts]: Start accepts. Automaton has 20111 states and 48267 transitions. Word has length 35 [2021-08-21 18:57:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:30,266 INFO L470 AbstractCegarLoop]: Abstraction has 20111 states and 48267 transitions. [2021-08-21 18:57:30,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 20111 states and 48267 transitions. [2021-08-21 18:57:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:30,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:30,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:30,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-08-21 18:57:30,296 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash -863859444, now seen corresponding path program 1 times [2021-08-21 18:57:30,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:30,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871378922] [2021-08-21 18:57:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:30,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:30,347 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 18:57:30,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:30,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871378922] [2021-08-21 18:57:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871378922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:57:30,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:57:30,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:57:30,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669242936] [2021-08-21 18:57:30,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:30,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:30,348 INFO L87 Difference]: Start difference. First operand 20111 states and 48267 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:30,486 INFO L93 Difference]: Finished difference Result 22764 states and 54165 transitions. [2021-08-21 18:57:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:30,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:30,530 INFO L225 Difference]: With dead ends: 22764 [2021-08-21 18:57:30,530 INFO L226 Difference]: Without dead ends: 22755 [2021-08-21 18:57:30,530 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 18:57:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22755 states. [2021-08-21 18:57:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22755 to 20204. [2021-08-21 18:57:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20204 states, 20203 states have (on average 2.409444141959115) internal successors, (48678), 20203 states have internal predecessors, (48678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20204 states to 20204 states and 48678 transitions. [2021-08-21 18:57:30,829 INFO L78 Accepts]: Start accepts. Automaton has 20204 states and 48678 transitions. Word has length 35 [2021-08-21 18:57:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:30,829 INFO L470 AbstractCegarLoop]: Abstraction has 20204 states and 48678 transitions. [2021-08-21 18:57:30,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20204 states and 48678 transitions. [2021-08-21 18:57:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:30,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:30,858 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-08-21 18:57:30,858 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:30,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2088630456, now seen corresponding path program 2 times [2021-08-21 18:57:30,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:30,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933529373] [2021-08-21 18:57:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:30,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:30,918 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 18:57:30,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:30,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933529373] [2021-08-21 18:57:30,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933529373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:30,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018295817] [2021-08-21 18:57:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:30,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:30,920 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 18:57:30,920 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 18:57:33,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:33,664 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 18:57:33,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018295817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:33,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:33,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:33,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488359211] [2021-08-21 18:57:33,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:33,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:33,665 INFO L87 Difference]: Start difference. First operand 20204 states and 48678 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:33,796 INFO L93 Difference]: Finished difference Result 22518 states and 53719 transitions. [2021-08-21 18:57:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:33,836 INFO L225 Difference]: With dead ends: 22518 [2021-08-21 18:57:33,837 INFO L226 Difference]: Without dead ends: 22509 [2021-08-21 18:57:33,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2021-08-21 18:57:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 20264. [2021-08-21 18:57:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20264 states, 20263 states have (on average 2.4137097172185755) internal successors, (48909), 20263 states have internal predecessors, (48909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20264 states to 20264 states and 48909 transitions. [2021-08-21 18:57:34,116 INFO L78 Accepts]: Start accepts. Automaton has 20264 states and 48909 transitions. Word has length 35 [2021-08-21 18:57:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:34,117 INFO L470 AbstractCegarLoop]: Abstraction has 20264 states and 48909 transitions. [2021-08-21 18:57:34,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 20264 states and 48909 transitions. [2021-08-21 18:57:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:34,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:34,146 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 18:57:34,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 18:57:34,347 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,SelfDestructingSolverStorable191 [2021-08-21 18:57:34,347 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2079150276, now seen corresponding path program 2 times [2021-08-21 18:57:34,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:34,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629462673] [2021-08-21 18:57:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:34,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:34,406 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 18:57:34,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629462673] [2021-08-21 18:57:34,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629462673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106356040] [2021-08-21 18:57:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:34,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:34,407 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 18:57:34,408 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 18:57:37,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:37,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:37,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:37,354 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 18:57:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106356040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:37,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:37,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:37,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323532067] [2021-08-21 18:57:37,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:37,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:37,355 INFO L87 Difference]: Start difference. First operand 20264 states and 48909 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:37,491 INFO L93 Difference]: Finished difference Result 22455 states and 53614 transitions. [2021-08-21 18:57:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:37,532 INFO L225 Difference]: With dead ends: 22455 [2021-08-21 18:57:37,532 INFO L226 Difference]: Without dead ends: 22446 [2021-08-21 18:57:37,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22446 states. [2021-08-21 18:57:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22446 to 20302. [2021-08-21 18:57:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20302 states, 20301 states have (on average 2.416678981330969) internal successors, (49061), 20301 states have internal predecessors, (49061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20302 states to 20302 states and 49061 transitions. [2021-08-21 18:57:37,830 INFO L78 Accepts]: Start accepts. Automaton has 20302 states and 49061 transitions. Word has length 35 [2021-08-21 18:57:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 20302 states and 49061 transitions. [2021-08-21 18:57:37,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 20302 states and 49061 transitions. [2021-08-21 18:57:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:37,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:37,860 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, 1, 1, 1] [2021-08-21 18:57:37,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 18:57:38,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:38,060 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1951963712, now seen corresponding path program 2 times [2021-08-21 18:57:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:38,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112380454] [2021-08-21 18:57:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:38,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:38,112 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 18:57:38,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:38,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112380454] [2021-08-21 18:57:38,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112380454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:38,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353559366] [2021-08-21 18:57:38,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:38,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:38,113 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 18:57:38,114 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 18:57:40,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:40,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:40,937 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 18:57:40,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353559366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:40,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:40,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496449271] [2021-08-21 18:57:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:40,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:40,938 INFO L87 Difference]: Start difference. First operand 20302 states and 49061 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:41,074 INFO L93 Difference]: Finished difference Result 22574 states and 53889 transitions. [2021-08-21 18:57:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:41,119 INFO L225 Difference]: With dead ends: 22574 [2021-08-21 18:57:41,119 INFO L226 Difference]: Without dead ends: 22565 [2021-08-21 18:57:41,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22565 states. [2021-08-21 18:57:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22565 to 20342. [2021-08-21 18:57:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20342 states, 20341 states have (on average 2.4183176834963866) internal successors, (49191), 20341 states have internal predecessors, (49191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20342 states to 20342 states and 49191 transitions. [2021-08-21 18:57:41,438 INFO L78 Accepts]: Start accepts. Automaton has 20342 states and 49191 transitions. Word has length 35 [2021-08-21 18:57:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:41,438 INFO L470 AbstractCegarLoop]: Abstraction has 20342 states and 49191 transitions. [2021-08-21 18:57:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 20342 states and 49191 transitions. [2021-08-21 18:57:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:41,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:41,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:41,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 18:57:41,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:41,669 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 542499396, now seen corresponding path program 4 times [2021-08-21 18:57:41,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:41,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062604633] [2021-08-21 18:57:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:41,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:41,731 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 18:57:41,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062604633] [2021-08-21 18:57:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062604633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671209267] [2021-08-21 18:57:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:41,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:41,732 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 18:57:41,733 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 18:57:44,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:44,563 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 18:57:44,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671209267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:44,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:44,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:44,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998557964] [2021-08-21 18:57:44,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:44,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:44,564 INFO L87 Difference]: Start difference. First operand 20342 states and 49191 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:44,800 INFO L93 Difference]: Finished difference Result 22544 states and 54072 transitions. [2021-08-21 18:57:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:44,845 INFO L225 Difference]: With dead ends: 22544 [2021-08-21 18:57:44,845 INFO L226 Difference]: Without dead ends: 22535 [2021-08-21 18:57:44,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-08-21 18:57:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 20384. [2021-08-21 18:57:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20384 states, 20383 states have (on average 2.4245204336947457) internal successors, (49419), 20383 states have internal predecessors, (49419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20384 states to 20384 states and 49419 transitions. [2021-08-21 18:57:45,132 INFO L78 Accepts]: Start accepts. Automaton has 20384 states and 49419 transitions. Word has length 35 [2021-08-21 18:57:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:45,132 INFO L470 AbstractCegarLoop]: Abstraction has 20384 states and 49419 transitions. [2021-08-21 18:57:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20384 states and 49419 transitions. [2021-08-21 18:57:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:45,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:45,161 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 18:57:45,184 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 18:57:45,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:45,362 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 796872524, now seen corresponding path program 4 times [2021-08-21 18:57:45,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:45,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265596792] [2021-08-21 18:57:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:45,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:45,416 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 18:57:45,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265596792] [2021-08-21 18:57:45,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265596792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763356067] [2021-08-21 18:57:45,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:45,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:45,417 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 18:57:45,418 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 18:57:48,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:48,261 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 18:57:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763356067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:48,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:48,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:48,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051053842] [2021-08-21 18:57:48,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:48,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:48,262 INFO L87 Difference]: Start difference. First operand 20384 states and 49419 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:48,404 INFO L93 Difference]: Finished difference Result 22451 states and 53869 transitions. [2021-08-21 18:57:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:48,443 INFO L225 Difference]: With dead ends: 22451 [2021-08-21 18:57:48,443 INFO L226 Difference]: Without dead ends: 22442 [2021-08-21 18:57:48,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:57:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2021-08-21 18:57:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 20398. [2021-08-21 18:57:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20398 states, 20397 states have (on average 2.426876501446291) internal successors, (49501), 20397 states have internal predecessors, (49501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20398 states to 20398 states and 49501 transitions. [2021-08-21 18:57:48,724 INFO L78 Accepts]: Start accepts. Automaton has 20398 states and 49501 transitions. Word has length 35 [2021-08-21 18:57:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:48,724 INFO L470 AbstractCegarLoop]: Abstraction has 20398 states and 49501 transitions. [2021-08-21 18:57:48,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 20398 states and 49501 transitions. [2021-08-21 18:57:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:48,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:48,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:48,775 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 18:57:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:48,953 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 924059088, now seen corresponding path program 4 times [2021-08-21 18:57:48,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:48,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476430706] [2021-08-21 18:57:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:48,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:49,004 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 18:57:49,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:49,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476430706] [2021-08-21 18:57:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476430706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:49,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492801684] [2021-08-21 18:57:49,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:49,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:49,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:49,005 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 18:57:49,005 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 18:57:51,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:51,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:51,911 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 18:57:51,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492801684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:51,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:51,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:51,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749836835] [2021-08-21 18:57:51,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:51,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:51,912 INFO L87 Difference]: Start difference. First operand 20398 states and 49501 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:52,055 INFO L93 Difference]: Finished difference Result 22546 states and 54141 transitions. [2021-08-21 18:57:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:52,101 INFO L225 Difference]: With dead ends: 22546 [2021-08-21 18:57:52,101 INFO L226 Difference]: Without dead ends: 22537 [2021-08-21 18:57:52,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22537 states. [2021-08-21 18:57:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22537 to 20426. [2021-08-21 18:57:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20426 states, 20425 states have (on average 2.430697674418605) internal successors, (49647), 20425 states have internal predecessors, (49647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20426 states to 20426 states and 49647 transitions. [2021-08-21 18:57:52,405 INFO L78 Accepts]: Start accepts. Automaton has 20426 states and 49647 transitions. Word has length 35 [2021-08-21 18:57:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 20426 states and 49647 transitions. [2021-08-21 18:57:52,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 20426 states and 49647 transitions. [2021-08-21 18:57:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:52,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:52,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:52,458 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 18:57:52,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:52,635 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1791077064, now seen corresponding path program 2 times [2021-08-21 18:57:52,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:52,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397036833] [2021-08-21 18:57:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:52,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:52,688 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 18:57:52,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:52,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397036833] [2021-08-21 18:57:52,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397036833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:52,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896783000] [2021-08-21 18:57:52,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:52,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:52,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:52,689 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 18:57:52,690 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 18:57:55,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:55,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:55,677 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 18:57:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896783000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:55,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:55,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:55,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382853050] [2021-08-21 18:57:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:55,678 INFO L87 Difference]: Start difference. First operand 20426 states and 49647 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:55,819 INFO L93 Difference]: Finished difference Result 22665 states and 54382 transitions. [2021-08-21 18:57:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:55,862 INFO L225 Difference]: With dead ends: 22665 [2021-08-21 18:57:55,862 INFO L226 Difference]: Without dead ends: 22656 [2021-08-21 18:57:55,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22656 states. [2021-08-21 18:57:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22656 to 20464. [2021-08-21 18:57:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20464 states, 20463 states have (on average 2.4329277232077406) internal successors, (49785), 20463 states have internal predecessors, (49785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20464 states to 20464 states and 49785 transitions. [2021-08-21 18:57:56,149 INFO L78 Accepts]: Start accepts. Automaton has 20464 states and 49785 transitions. Word has length 35 [2021-08-21 18:57:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:56,149 INFO L470 AbstractCegarLoop]: Abstraction has 20464 states and 49785 transitions. [2021-08-21 18:57:56,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20464 states and 49785 transitions. [2021-08-21 18:57:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:56,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:56,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:56,201 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 18:57:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:56,380 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:57:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2092351028, now seen corresponding path program 2 times [2021-08-21 18:57:56,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:56,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991612356] [2021-08-21 18:57:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:56,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:56,437 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 18:57:56,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:56,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991612356] [2021-08-21 18:57:56,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991612356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:56,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813204594] [2021-08-21 18:57:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:56,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:56,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:56,438 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 18:57:56,438 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 18:57:59,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:59,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:57:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:59,340 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 18:57:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813204594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:59,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:57:59,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822424966] [2021-08-21 18:57:59,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:57:59,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:57:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:57:59,341 INFO L87 Difference]: Start difference. First operand 20464 states and 49785 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:59,469 INFO L93 Difference]: Finished difference Result 22784 states and 54623 transitions. [2021-08-21 18:57:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:57:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:59,512 INFO L225 Difference]: With dead ends: 22784 [2021-08-21 18:57:59,512 INFO L226 Difference]: Without dead ends: 22775 [2021-08-21 18:57:59,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:57:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22775 states. [2021-08-21 18:57:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22775 to 20501. [2021-08-21 18:57:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20501 states, 20500 states have (on average 2.4338048780487807) internal successors, (49893), 20500 states have internal predecessors, (49893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20501 states to 20501 states and 49893 transitions. [2021-08-21 18:57:59,820 INFO L78 Accepts]: Start accepts. Automaton has 20501 states and 49893 transitions. Word has length 35 [2021-08-21 18:57:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:59,820 INFO L470 AbstractCegarLoop]: Abstraction has 20501 states and 49893 transitions. [2021-08-21 18:57:59,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:57:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 20501 states and 49893 transitions. [2021-08-21 18:57:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:57:59,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:59,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:59,873 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 18:58:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:00,049 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1983602384, now seen corresponding path program 4 times [2021-08-21 18:58:00,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:00,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685167338] [2021-08-21 18:58:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:00,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:00,121 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 18:58:00,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:00,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685167338] [2021-08-21 18:58:00,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685167338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:00,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934652863] [2021-08-21 18:58:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:00,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:00,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:00,122 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 18:58:00,123 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 18:58:02,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:03,037 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 18:58:03,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934652863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:03,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:03,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:03,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974021191] [2021-08-21 18:58:03,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:03,038 INFO L87 Difference]: Start difference. First operand 20501 states and 49893 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:03,180 INFO L93 Difference]: Finished difference Result 22800 states and 54975 transitions. [2021-08-21 18:58:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:03,220 INFO L225 Difference]: With dead ends: 22800 [2021-08-21 18:58:03,220 INFO L226 Difference]: Without dead ends: 22791 [2021-08-21 18:58:03,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22791 states. [2021-08-21 18:58:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22791 to 20552. [2021-08-21 18:58:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20552 states, 20551 states have (on average 2.4409031190696315) internal successors, (50163), 20551 states have internal predecessors, (50163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20552 states to 20552 states and 50163 transitions. [2021-08-21 18:58:03,629 INFO L78 Accepts]: Start accepts. Automaton has 20552 states and 50163 transitions. Word has length 35 [2021-08-21 18:58:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:03,629 INFO L470 AbstractCegarLoop]: Abstraction has 20552 states and 50163 transitions. [2021-08-21 18:58:03,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20552 states and 50163 transitions. [2021-08-21 18:58:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:03,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:03,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:03,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 18:58:03,859 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,SelfDestructingSolverStorable199 [2021-08-21 18:58:03,859 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:03,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1488286504, now seen corresponding path program 4 times [2021-08-21 18:58:03,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:03,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046249147] [2021-08-21 18:58:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:03,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:03,913 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 18:58:03,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:03,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046249147] [2021-08-21 18:58:03,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046249147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:03,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665309858] [2021-08-21 18:58:03,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:03,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:03,914 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 18:58:03,914 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 18:58:06,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:06,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:06,877 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 18:58:06,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665309858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:06,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:06,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:06,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737202522] [2021-08-21 18:58:06,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:06,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:06,878 INFO L87 Difference]: Start difference. First operand 20552 states and 50163 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:07,027 INFO L93 Difference]: Finished difference Result 22712 states and 54786 transitions. [2021-08-21 18:58:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:07,069 INFO L225 Difference]: With dead ends: 22712 [2021-08-21 18:58:07,069 INFO L226 Difference]: Without dead ends: 22703 [2021-08-21 18:58:07,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22703 states. [2021-08-21 18:58:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22703 to 20575. [2021-08-21 18:58:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20575 states, 20574 states have (on average 2.444395839408963) internal successors, (50291), 20574 states have internal predecessors, (50291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20575 states to 20575 states and 50291 transitions. [2021-08-21 18:58:07,376 INFO L78 Accepts]: Start accepts. Automaton has 20575 states and 50291 transitions. Word has length 35 [2021-08-21 18:58:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:07,376 INFO L470 AbstractCegarLoop]: Abstraction has 20575 states and 50291 transitions. [2021-08-21 18:58:07,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20575 states and 50291 transitions. [2021-08-21 18:58:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:07,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:07,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:07,435 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 18:58:07,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 18:58:07,625 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1076747300, now seen corresponding path program 4 times [2021-08-21 18:58:07,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:07,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018677500] [2021-08-21 18:58:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:07,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:07,680 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 18:58:07,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:07,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018677500] [2021-08-21 18:58:07,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018677500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:07,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697754041] [2021-08-21 18:58:07,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:07,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:07,681 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 18:58:07,682 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 18:58:10,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:10,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:10,671 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 18:58:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697754041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:10,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:10,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979999148] [2021-08-21 18:58:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:10,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:10,672 INFO L87 Difference]: Start difference. First operand 20575 states and 50291 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:10,808 INFO L93 Difference]: Finished difference Result 22818 states and 55091 transitions. [2021-08-21 18:58:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:10,849 INFO L225 Difference]: With dead ends: 22818 [2021-08-21 18:58:10,849 INFO L226 Difference]: Without dead ends: 22809 [2021-08-21 18:58:10,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22809 states. [2021-08-21 18:58:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22809 to 20612. [2021-08-21 18:58:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20612 states, 20611 states have (on average 2.449032070253748) internal successors, (50477), 20611 states have internal predecessors, (50477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20612 states to 20612 states and 50477 transitions. [2021-08-21 18:58:11,144 INFO L78 Accepts]: Start accepts. Automaton has 20612 states and 50477 transitions. Word has length 35 [2021-08-21 18:58:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:11,144 INFO L470 AbstractCegarLoop]: Abstraction has 20612 states and 50477 transitions. [2021-08-21 18:58:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20612 states and 50477 transitions. [2021-08-21 18:58:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:11,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:11,174 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, 1, 1, 1] [2021-08-21 18:58:11,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 18:58:11,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:11,374 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -765138292, now seen corresponding path program 1 times [2021-08-21 18:58:11,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:11,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596247519] [2021-08-21 18:58:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:11,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:11,440 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 18:58:11,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596247519] [2021-08-21 18:58:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596247519] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:58:11,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:58:11,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:58:11,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483837126] [2021-08-21 18:58:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:11,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:11,441 INFO L87 Difference]: Start difference. First operand 20612 states and 50477 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:11,568 INFO L93 Difference]: Finished difference Result 22960 states and 55183 transitions. [2021-08-21 18:58:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:11,608 INFO L225 Difference]: With dead ends: 22960 [2021-08-21 18:58:11,608 INFO L226 Difference]: Without dead ends: 22947 [2021-08-21 18:58:11,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 18:58:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22947 states. [2021-08-21 18:58:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22947 to 20665. [2021-08-21 18:58:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20665 states, 20664 states have (on average 2.4489934185056135) internal successors, (50606), 20664 states have internal predecessors, (50606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20665 states to 20665 states and 50606 transitions. [2021-08-21 18:58:11,900 INFO L78 Accepts]: Start accepts. Automaton has 20665 states and 50606 transitions. Word has length 35 [2021-08-21 18:58:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 20665 states and 50606 transitions. [2021-08-21 18:58:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20665 states and 50606 transitions. [2021-08-21 18:58:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:11,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:11,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:11,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-08-21 18:58:11,929 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash 692009356, now seen corresponding path program 1 times [2021-08-21 18:58:11,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:11,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848631933] [2021-08-21 18:58:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:11,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:11,981 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 18:58:11,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:11,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848631933] [2021-08-21 18:58:11,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848631933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:58:11,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:58:11,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:58:11,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463073106] [2021-08-21 18:58:11,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:11,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:11,982 INFO L87 Difference]: Start difference. First operand 20665 states and 50606 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:12,115 INFO L93 Difference]: Finished difference Result 23129 states and 55858 transitions. [2021-08-21 18:58:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:12,156 INFO L225 Difference]: With dead ends: 23129 [2021-08-21 18:58:12,156 INFO L226 Difference]: Without dead ends: 23120 [2021-08-21 18:58:12,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23120 states. [2021-08-21 18:58:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23120 to 20718. [2021-08-21 18:58:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20718 states, 20717 states have (on average 2.452285562581455) internal successors, (50804), 20717 states have internal predecessors, (50804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20718 states to 20718 states and 50804 transitions. [2021-08-21 18:58:12,531 INFO L78 Accepts]: Start accepts. Automaton has 20718 states and 50804 transitions. Word has length 35 [2021-08-21 18:58:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:12,531 INFO L470 AbstractCegarLoop]: Abstraction has 20718 states and 50804 transitions. [2021-08-21 18:58:12,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20718 states and 50804 transitions. [2021-08-21 18:58:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:12,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:12,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:12,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-08-21 18:58:12,561 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1824549048, now seen corresponding path program 2 times [2021-08-21 18:58:12,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:12,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237448862] [2021-08-21 18:58:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:12,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:12,613 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 18:58:12,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:12,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237448862] [2021-08-21 18:58:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237448862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:12,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068129042] [2021-08-21 18:58:12,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:12,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:12,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:12,614 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 18:58:12,615 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 18:58:15,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:15,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:15,627 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 18:58:15,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068129042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:15,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:15,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:15,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253483429] [2021-08-21 18:58:15,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:15,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:15,628 INFO L87 Difference]: Start difference. First operand 20718 states and 50804 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:15,760 INFO L93 Difference]: Finished difference Result 22729 states and 54873 transitions. [2021-08-21 18:58:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:15,802 INFO L225 Difference]: With dead ends: 22729 [2021-08-21 18:58:15,802 INFO L226 Difference]: Without dead ends: 22720 [2021-08-21 18:58:15,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22720 states. [2021-08-21 18:58:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22720 to 20742. [2021-08-21 18:58:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20742 states, 20741 states have (on average 2.4524854153608793) internal successors, (50867), 20741 states have internal predecessors, (50867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20742 states to 20742 states and 50867 transitions. [2021-08-21 18:58:16,105 INFO L78 Accepts]: Start accepts. Automaton has 20742 states and 50867 transitions. Word has length 35 [2021-08-21 18:58:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:16,105 INFO L470 AbstractCegarLoop]: Abstraction has 20742 states and 50867 transitions. [2021-08-21 18:58:16,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20742 states and 50867 transitions. [2021-08-21 18:58:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:16,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:16,136 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, 1, 1, 1] [2021-08-21 18:58:16,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 18:58:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:16,336 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1806097224, now seen corresponding path program 1 times [2021-08-21 18:58:16,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:16,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752798336] [2021-08-21 18:58:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:16,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:16,389 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 18:58:16,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:16,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752798336] [2021-08-21 18:58:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752798336] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:58:16,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:58:16,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:58:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104463916] [2021-08-21 18:58:16,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:16,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:16,390 INFO L87 Difference]: Start difference. First operand 20742 states and 50867 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:16,536 INFO L93 Difference]: Finished difference Result 23352 states and 56282 transitions. [2021-08-21 18:58:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:16,595 INFO L225 Difference]: With dead ends: 23352 [2021-08-21 18:58:16,595 INFO L226 Difference]: Without dead ends: 23339 [2021-08-21 18:58:16,595 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 18:58:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23339 states. [2021-08-21 18:58:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23339 to 20801. [2021-08-21 18:58:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20801 states, 20800 states have (on average 2.454278846153846) internal successors, (51049), 20800 states have internal predecessors, (51049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20801 states to 20801 states and 51049 transitions. [2021-08-21 18:58:16,913 INFO L78 Accepts]: Start accepts. Automaton has 20801 states and 51049 transitions. Word has length 35 [2021-08-21 18:58:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 20801 states and 51049 transitions. [2021-08-21 18:58:16,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20801 states and 51049 transitions. [2021-08-21 18:58:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:16,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:16,946 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 18:58:16,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-08-21 18:58:16,946 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash -73801928, now seen corresponding path program 2 times [2021-08-21 18:58:16,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:16,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527399402] [2021-08-21 18:58:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:16,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:17,001 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 18:58:17,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:17,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527399402] [2021-08-21 18:58:17,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527399402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:17,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867072741] [2021-08-21 18:58:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:17,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:17,002 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 18:58:17,002 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 18:58:19,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:19,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:20,059 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 18:58:20,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867072741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:20,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:20,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:20,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227741938] [2021-08-21 18:58:20,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:20,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:20,060 INFO L87 Difference]: Start difference. First operand 20801 states and 51049 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:20,218 INFO L93 Difference]: Finished difference Result 23160 states and 56218 transitions. [2021-08-21 18:58:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:20,262 INFO L225 Difference]: With dead ends: 23160 [2021-08-21 18:58:20,262 INFO L226 Difference]: Without dead ends: 23151 [2021-08-21 18:58:20,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23151 states. [2021-08-21 18:58:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23151 to 20861. [2021-08-21 18:58:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20860 states have (on average 2.4604026845637583) internal successors, (51324), 20860 states have internal predecessors, (51324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 51324 transitions. [2021-08-21 18:58:20,616 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 51324 transitions. Word has length 35 [2021-08-21 18:58:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:20,616 INFO L470 AbstractCegarLoop]: Abstraction has 20861 states and 51324 transitions. [2021-08-21 18:58:20,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 51324 transitions. [2021-08-21 18:58:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:20,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:20,652 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, 1, 1, 1] [2021-08-21 18:58:20,678 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 18:58:20,864 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,SelfDestructingSolverStorable206 [2021-08-21 18:58:20,865 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:20,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash -690989260, now seen corresponding path program 2 times [2021-08-21 18:58:20,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:20,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903526716] [2021-08-21 18:58:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:20,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:20,920 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 18:58:20,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:20,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903526716] [2021-08-21 18:58:20,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903526716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:20,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670588430] [2021-08-21 18:58:20,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:20,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:20,921 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 18:58:20,922 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 18:58:23,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:24,120 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 18:58:24,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670588430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:24,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:24,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619757455] [2021-08-21 18:58:24,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:24,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:24,121 INFO L87 Difference]: Start difference. First operand 20861 states and 51324 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:24,279 INFO L93 Difference]: Finished difference Result 23269 states and 56572 transitions. [2021-08-21 18:58:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:24,326 INFO L225 Difference]: With dead ends: 23269 [2021-08-21 18:58:24,326 INFO L226 Difference]: Without dead ends: 23260 [2021-08-21 18:58:24,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:58:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23260 states. [2021-08-21 18:58:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23260 to 20932. [2021-08-21 18:58:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20932 states, 20931 states have (on average 2.46529071711815) internal successors, (51601), 20931 states have internal predecessors, (51601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20932 states to 20932 states and 51601 transitions. [2021-08-21 18:58:24,662 INFO L78 Accepts]: Start accepts. Automaton has 20932 states and 51601 transitions. Word has length 35 [2021-08-21 18:58:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:24,662 INFO L470 AbstractCegarLoop]: Abstraction has 20932 states and 51601 transitions. [2021-08-21 18:58:24,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 20932 states and 51601 transitions. [2021-08-21 18:58:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:24,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:24,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:24,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 18:58:24,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-21 18:58:24,897 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1308176592, now seen corresponding path program 2 times [2021-08-21 18:58:24,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:24,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125772781] [2021-08-21 18:58:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:24,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:24,951 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 18:58:24,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:24,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125772781] [2021-08-21 18:58:24,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125772781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:24,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097290498] [2021-08-21 18:58:24,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:24,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:24,953 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 18:58:24,953 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 18:58:27,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:27,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:28,078 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 18:58:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097290498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:28,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:28,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839012784] [2021-08-21 18:58:28,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:28,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:28,079 INFO L87 Difference]: Start difference. First operand 20932 states and 51601 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:28,220 INFO L93 Difference]: Finished difference Result 23177 states and 56400 transitions. [2021-08-21 18:58:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:28,264 INFO L225 Difference]: With dead ends: 23177 [2021-08-21 18:58:28,265 INFO L226 Difference]: Without dead ends: 23168 [2021-08-21 18:58:28,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:58:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23168 states. [2021-08-21 18:58:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23168 to 20970. [2021-08-21 18:58:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20970 states, 20969 states have (on average 2.4687395679336164) internal successors, (51767), 20969 states have internal predecessors, (51767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20970 states to 20970 states and 51767 transitions. [2021-08-21 18:58:28,597 INFO L78 Accepts]: Start accepts. Automaton has 20970 states and 51767 transitions. Word has length 35 [2021-08-21 18:58:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:28,597 INFO L470 AbstractCegarLoop]: Abstraction has 20970 states and 51767 transitions. [2021-08-21 18:58:28,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20970 states and 51767 transitions. [2021-08-21 18:58:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:28,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:28,633 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, 1, 1, 1] [2021-08-21 18:58:28,658 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 18:58:28,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:28,833 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1925363924, now seen corresponding path program 2 times [2021-08-21 18:58:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:28,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605835705] [2021-08-21 18:58:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:28,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:28,887 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 18:58:28,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605835705] [2021-08-21 18:58:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605835705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438466358] [2021-08-21 18:58:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:28,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:28,890 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 18:58:28,893 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 18:58:31,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:32,137 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 18:58:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438466358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:32,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:32,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:32,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714094520] [2021-08-21 18:58:32,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:32,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:32,138 INFO L87 Difference]: Start difference. First operand 20970 states and 51767 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:32,275 INFO L93 Difference]: Finished difference Result 23296 states and 56706 transitions. [2021-08-21 18:58:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:32,320 INFO L225 Difference]: With dead ends: 23296 [2021-08-21 18:58:32,320 INFO L226 Difference]: Without dead ends: 23287 [2021-08-21 18:58:32,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23287 states. [2021-08-21 18:58:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23287 to 21011. [2021-08-21 18:58:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 2.470775821037601) internal successors, (51911), 21010 states have internal predecessors, (51911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 51911 transitions. [2021-08-21 18:58:32,639 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 51911 transitions. Word has length 35 [2021-08-21 18:58:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:32,639 INFO L470 AbstractCegarLoop]: Abstraction has 21011 states and 51911 transitions. [2021-08-21 18:58:32,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 51911 transitions. [2021-08-21 18:58:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:32,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:32,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:32,696 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 18:58:32,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:32,870 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1292990660, now seen corresponding path program 3 times [2021-08-21 18:58:32,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:32,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243763736] [2021-08-21 18:58:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:32,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:32,922 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 18:58:32,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:32,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243763736] [2021-08-21 18:58:32,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243763736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:32,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500461487] [2021-08-21 18:58:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:32,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:32,924 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 18:58:32,930 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 18:58:35,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:35,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:36,155 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 18:58:36,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500461487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:36,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381415553] [2021-08-21 18:58:36,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:36,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:36,156 INFO L87 Difference]: Start difference. First operand 21011 states and 51911 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:36,327 INFO L93 Difference]: Finished difference Result 23439 states and 57166 transitions. [2021-08-21 18:58:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:36,372 INFO L225 Difference]: With dead ends: 23439 [2021-08-21 18:58:36,372 INFO L226 Difference]: Without dead ends: 23430 [2021-08-21 18:58:36,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23430 states. [2021-08-21 18:58:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23430 to 21070. [2021-08-21 18:58:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21070 states, 21069 states have (on average 2.475010679196924) internal successors, (52146), 21069 states have internal predecessors, (52146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21070 states to 21070 states and 52146 transitions. [2021-08-21 18:58:36,687 INFO L78 Accepts]: Start accepts. Automaton has 21070 states and 52146 transitions. Word has length 35 [2021-08-21 18:58:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:36,687 INFO L470 AbstractCegarLoop]: Abstraction has 21070 states and 52146 transitions. [2021-08-21 18:58:36,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 21070 states and 52146 transitions. [2021-08-21 18:58:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:36,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:36,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:36,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 18:58:36,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 18:58:36,933 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1662886088, now seen corresponding path program 3 times [2021-08-21 18:58:36,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:36,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345611948] [2021-08-21 18:58:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:36,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:36,988 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 18:58:36,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:36,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345611948] [2021-08-21 18:58:36,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345611948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:36,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87968490] [2021-08-21 18:58:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:36,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:36,989 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 18:58:36,990 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 18:58:40,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:40,168 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 18:58:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87968490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:40,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:40,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:40,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137415637] [2021-08-21 18:58:40,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:40,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:40,169 INFO L87 Difference]: Start difference. First operand 21070 states and 52146 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:40,311 INFO L93 Difference]: Finished difference Result 23445 states and 57351 transitions. [2021-08-21 18:58:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:40,362 INFO L225 Difference]: With dead ends: 23445 [2021-08-21 18:58:40,362 INFO L226 Difference]: Without dead ends: 23436 [2021-08-21 18:58:40,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-08-21 18:58:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21122. [2021-08-21 18:58:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21122 states, 21121 states have (on average 2.4805170209743856) internal successors, (52391), 21121 states have internal predecessors, (52391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21122 states to 21122 states and 52391 transitions. [2021-08-21 18:58:40,768 INFO L78 Accepts]: Start accepts. Automaton has 21122 states and 52391 transitions. Word has length 35 [2021-08-21 18:58:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:40,768 INFO L470 AbstractCegarLoop]: Abstraction has 21122 states and 52391 transitions. [2021-08-21 18:58:40,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 21122 states and 52391 transitions. [2021-08-21 18:58:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:40,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:40,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:40,823 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 18:58:40,999 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,SelfDestructingSolverStorable211 [2021-08-21 18:58:40,999 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:40,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1296497992, now seen corresponding path program 3 times [2021-08-21 18:58:40,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:40,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118206419] [2021-08-21 18:58:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:41,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:41,066 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 18:58:41,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:41,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118206419] [2021-08-21 18:58:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118206419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:41,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158398056] [2021-08-21 18:58:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:41,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:41,067 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 18:58:41,067 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 18:58:44,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:44,251 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 18:58:44,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158398056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:44,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:44,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:44,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79206426] [2021-08-21 18:58:44,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:44,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:44,252 INFO L87 Difference]: Start difference. First operand 21122 states and 52391 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:44,396 INFO L93 Difference]: Finished difference Result 23300 states and 56973 transitions. [2021-08-21 18:58:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:44,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:44,443 INFO L225 Difference]: With dead ends: 23300 [2021-08-21 18:58:44,443 INFO L226 Difference]: Without dead ends: 23291 [2021-08-21 18:58:44,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23291 states. [2021-08-21 18:58:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23291 to 21150. [2021-08-21 18:58:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21150 states, 21149 states have (on average 2.4828124261194384) internal successors, (52509), 21149 states have internal predecessors, (52509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21150 states to 21150 states and 52509 transitions. [2021-08-21 18:58:44,758 INFO L78 Accepts]: Start accepts. Automaton has 21150 states and 52509 transitions. Word has length 35 [2021-08-21 18:58:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:44,759 INFO L470 AbstractCegarLoop]: Abstraction has 21150 states and 52509 transitions. [2021-08-21 18:58:44,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 21150 states and 52509 transitions. [2021-08-21 18:58:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:44,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:44,789 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, 1, 1, 1] [2021-08-21 18:58:44,814 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 18:58:44,990 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,SelfDestructingSolverStorable212 [2021-08-21 18:58:44,990 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash 348424460, now seen corresponding path program 3 times [2021-08-21 18:58:44,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:44,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523578881] [2021-08-21 18:58:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:44,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:45,044 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 18:58:45,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:45,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523578881] [2021-08-21 18:58:45,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523578881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:45,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826695668] [2021-08-21 18:58:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:45,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:45,045 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 18:58:45,046 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 18:58:48,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:48,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:48,271 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 18:58:48,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826695668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:48,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:48,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:48,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326909906] [2021-08-21 18:58:48,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:48,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:48,272 INFO L87 Difference]: Start difference. First operand 21150 states and 52509 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:48,409 INFO L93 Difference]: Finished difference Result 23466 states and 57219 transitions. [2021-08-21 18:58:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:48,453 INFO L225 Difference]: With dead ends: 23466 [2021-08-21 18:58:48,453 INFO L226 Difference]: Without dead ends: 23453 [2021-08-21 18:58:48,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23453 states. [2021-08-21 18:58:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23453 to 21184. [2021-08-21 18:58:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21184 states, 21183 states have (on average 2.484633904546098) internal successors, (52632), 21183 states have internal predecessors, (52632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21184 states to 21184 states and 52632 transitions. [2021-08-21 18:58:48,764 INFO L78 Accepts]: Start accepts. Automaton has 21184 states and 52632 transitions. Word has length 35 [2021-08-21 18:58:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:48,764 INFO L470 AbstractCegarLoop]: Abstraction has 21184 states and 52632 transitions. [2021-08-21 18:58:48,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 21184 states and 52632 transitions. [2021-08-21 18:58:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:48,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:48,796 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 18:58:48,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 18:58:48,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 18:58:48,996 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1805572108, now seen corresponding path program 3 times [2021-08-21 18:58:48,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:48,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066020258] [2021-08-21 18:58:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:48,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:49,050 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 18:58:49,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:49,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066020258] [2021-08-21 18:58:49,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066020258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:49,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617413148] [2021-08-21 18:58:49,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:49,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:49,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:49,051 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 18:58:49,051 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 18:58:52,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:52,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:52,394 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 18:58:52,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617413148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:52,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:52,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:52,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821854978] [2021-08-21 18:58:52,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:52,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:52,395 INFO L87 Difference]: Start difference. First operand 21184 states and 52632 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:52,540 INFO L93 Difference]: Finished difference Result 23661 states and 58045 transitions. [2021-08-21 18:58:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:52,584 INFO L225 Difference]: With dead ends: 23661 [2021-08-21 18:58:52,584 INFO L226 Difference]: Without dead ends: 23652 [2021-08-21 18:58:52,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:58:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23652 states. [2021-08-21 18:58:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23652 to 21246. [2021-08-21 18:58:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21246 states, 21245 states have (on average 2.4895269475170627) internal successors, (52890), 21245 states have internal predecessors, (52890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 52890 transitions. [2021-08-21 18:58:52,895 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 52890 transitions. Word has length 35 [2021-08-21 18:58:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 21246 states and 52890 transitions. [2021-08-21 18:58:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 52890 transitions. [2021-08-21 18:58:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:52,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:52,927 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, 1, 1, 1] [2021-08-21 18:58:52,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:53,128 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,SelfDestructingSolverStorable214 [2021-08-21 18:58:53,128 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash 865476094, now seen corresponding path program 5 times [2021-08-21 18:58:53,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:53,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226985207] [2021-08-21 18:58:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:53,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:53,188 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 18:58:53,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:53,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226985207] [2021-08-21 18:58:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226985207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:53,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762264144] [2021-08-21 18:58:53,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:53,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:53,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:53,189 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 18:58:53,190 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 18:58:56,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:56,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:56,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:58:56,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:56,485 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 18:58:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762264144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:56,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:56,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:58:56,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172398301] [2021-08-21 18:58:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:58:56,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:58:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:56,486 INFO L87 Difference]: Start difference. First operand 21246 states and 52890 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:56,639 INFO L93 Difference]: Finished difference Result 23130 states and 57026 transitions. [2021-08-21 18:58:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:58:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:56,682 INFO L225 Difference]: With dead ends: 23130 [2021-08-21 18:58:56,682 INFO L226 Difference]: Without dead ends: 23121 [2021-08-21 18:58:56,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:58:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23121 states. [2021-08-21 18:58:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23121 to 21282. [2021-08-21 18:58:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21282 states, 21281 states have (on average 2.4925520417273623) internal successors, (53044), 21281 states have internal predecessors, (53044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21282 states to 21282 states and 53044 transitions. [2021-08-21 18:58:56,997 INFO L78 Accepts]: Start accepts. Automaton has 21282 states and 53044 transitions. Word has length 35 [2021-08-21 18:58:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:56,997 INFO L470 AbstractCegarLoop]: Abstraction has 21282 states and 53044 transitions. [2021-08-21 18:58:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:58:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 21282 states and 53044 transitions. [2021-08-21 18:58:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:58:57,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:57,029 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, 1, 1, 1] [2021-08-21 18:58:57,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 18:58:57,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:57,229 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:58:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash 43816636, now seen corresponding path program 6 times [2021-08-21 18:58:57,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:57,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771583998] [2021-08-21 18:58:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:57,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:57,283 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 18:58:57,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:57,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771583998] [2021-08-21 18:58:57,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771583998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:57,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027938156] [2021-08-21 18:58:57,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:57,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:57,284 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 18:58:57,285 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 18:59:00,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:00,610 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 18:59:00,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027938156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:00,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:00,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:00,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780628456] [2021-08-21 18:59:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:00,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:00,611 INFO L87 Difference]: Start difference. First operand 21282 states and 53044 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:00,764 INFO L93 Difference]: Finished difference Result 23095 states and 56995 transitions. [2021-08-21 18:59:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:00,806 INFO L225 Difference]: With dead ends: 23095 [2021-08-21 18:59:00,806 INFO L226 Difference]: Without dead ends: 23086 [2021-08-21 18:59:00,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:59:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23086 states. [2021-08-21 18:59:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23086 to 21310. [2021-08-21 18:59:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21310 states, 21309 states have (on average 2.4958468252850907) internal successors, (53184), 21309 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21310 states to 21310 states and 53184 transitions. [2021-08-21 18:59:01,102 INFO L78 Accepts]: Start accepts. Automaton has 21310 states and 53184 transitions. Word has length 35 [2021-08-21 18:59:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:01,103 INFO L470 AbstractCegarLoop]: Abstraction has 21310 states and 53184 transitions. [2021-08-21 18:59:01,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21310 states and 53184 transitions. [2021-08-21 18:59:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:01,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:01,133 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 18:59:01,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 18:59:01,334 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,SelfDestructingSolverStorable216 [2021-08-21 18:59:01,334 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1930792236, now seen corresponding path program 3 times [2021-08-21 18:59:01,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:01,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141092827] [2021-08-21 18:59:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:01,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:01,394 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 18:59:01,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141092827] [2021-08-21 18:59:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141092827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498156743] [2021-08-21 18:59:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:01,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:01,396 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 18:59:01,396 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 18:59:04,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:04,646 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 18:59:04,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498156743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:04,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:04,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:04,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169023862] [2021-08-21 18:59:04,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:04,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:04,647 INFO L87 Difference]: Start difference. First operand 21310 states and 53184 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:04,786 INFO L93 Difference]: Finished difference Result 23594 states and 58120 transitions. [2021-08-21 18:59:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:04,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:04,830 INFO L225 Difference]: With dead ends: 23594 [2021-08-21 18:59:04,830 INFO L226 Difference]: Without dead ends: 23585 [2021-08-21 18:59:04,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:59:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23585 states. [2021-08-21 18:59:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23585 to 21348. [2021-08-21 18:59:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21348 states, 21347 states have (on average 2.4979153979481894) internal successors, (53323), 21347 states have internal predecessors, (53323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21348 states to 21348 states and 53323 transitions. [2021-08-21 18:59:05,159 INFO L78 Accepts]: Start accepts. Automaton has 21348 states and 53323 transitions. Word has length 35 [2021-08-21 18:59:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:05,159 INFO L470 AbstractCegarLoop]: Abstraction has 21348 states and 53323 transitions. [2021-08-21 18:59:05,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 21348 states and 53323 transitions. [2021-08-21 18:59:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:05,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:05,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:05,217 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 18:59:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:05,392 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -591701688, now seen corresponding path program 3 times [2021-08-21 18:59:05,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:05,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247198904] [2021-08-21 18:59:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:05,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:05,449 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 18:59:05,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:05,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247198904] [2021-08-21 18:59:05,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247198904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:05,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122989007] [2021-08-21 18:59:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:05,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:05,450 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 18:59:05,451 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 18:59:08,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:08,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:08,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:08,794 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 18:59:08,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122989007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:08,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:08,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861816138] [2021-08-21 18:59:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:08,795 INFO L87 Difference]: Start difference. First operand 21348 states and 53323 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:08,939 INFO L93 Difference]: Finished difference Result 23582 states and 58235 transitions. [2021-08-21 18:59:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:08,982 INFO L225 Difference]: With dead ends: 23582 [2021-08-21 18:59:08,982 INFO L226 Difference]: Without dead ends: 23573 [2021-08-21 18:59:08,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23573 states. [2021-08-21 18:59:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23573 to 21377. [2021-08-21 18:59:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21377 states, 21376 states have (on average 2.500374251497006) internal successors, (53448), 21376 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21377 states to 21377 states and 53448 transitions. [2021-08-21 18:59:09,408 INFO L78 Accepts]: Start accepts. Automaton has 21377 states and 53448 transitions. Word has length 35 [2021-08-21 18:59:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:09,409 INFO L470 AbstractCegarLoop]: Abstraction has 21377 states and 53448 transitions. [2021-08-21 18:59:09,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 21377 states and 53448 transitions. [2021-08-21 18:59:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:09,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:09,441 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 18:59:09,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 18:59:09,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:09,641 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -225313592, now seen corresponding path program 3 times [2021-08-21 18:59:09,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:09,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318512591] [2021-08-21 18:59:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:09,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:09,701 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 18:59:09,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:09,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318512591] [2021-08-21 18:59:09,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318512591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:09,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097742789] [2021-08-21 18:59:09,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:09,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:09,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:09,702 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 18:59:09,702 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 18:59:12,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:12,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:13,059 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 18:59:13,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097742789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:13,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:13,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:13,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342729011] [2021-08-21 18:59:13,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:13,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:13,060 INFO L87 Difference]: Start difference. First operand 21377 states and 53448 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:13,199 INFO L93 Difference]: Finished difference Result 23421 states and 57769 transitions. [2021-08-21 18:59:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:13,241 INFO L225 Difference]: With dead ends: 23421 [2021-08-21 18:59:13,241 INFO L226 Difference]: Without dead ends: 23412 [2021-08-21 18:59:13,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23412 states. [2021-08-21 18:59:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23412 to 21387. [2021-08-21 18:59:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21387 states, 21386 states have (on average 2.501215748620593) internal successors, (53491), 21386 states have internal predecessors, (53491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21387 states to 21387 states and 53491 transitions. [2021-08-21 18:59:13,553 INFO L78 Accepts]: Start accepts. Automaton has 21387 states and 53491 transitions. Word has length 35 [2021-08-21 18:59:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:13,553 INFO L470 AbstractCegarLoop]: Abstraction has 21387 states and 53491 transitions. [2021-08-21 18:59:13,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21387 states and 53491 transitions. [2021-08-21 18:59:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:13,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:13,585 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, 1, 1, 1] [2021-08-21 18:59:13,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 18:59:13,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-21 18:59:13,785 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1419608860, now seen corresponding path program 3 times [2021-08-21 18:59:13,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:13,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809263554] [2021-08-21 18:59:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:13,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:13,838 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 18:59:13,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:13,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809263554] [2021-08-21 18:59:13,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809263554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:13,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877239098] [2021-08-21 18:59:13,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:13,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:13,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:13,840 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 18:59:13,840 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 18:59:16,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:17,159 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 18:59:17,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877239098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:17,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:17,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:17,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115169379] [2021-08-21 18:59:17,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:17,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:17,160 INFO L87 Difference]: Start difference. First operand 21387 states and 53491 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:17,295 INFO L93 Difference]: Finished difference Result 23565 states and 57909 transitions. [2021-08-21 18:59:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:17,339 INFO L225 Difference]: With dead ends: 23565 [2021-08-21 18:59:17,339 INFO L226 Difference]: Without dead ends: 23552 [2021-08-21 18:59:17,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:59:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23552 states. [2021-08-21 18:59:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23552 to 21403. [2021-08-21 18:59:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21403 states, 21402 states have (on average 2.5019624334174377) internal successors, (53547), 21402 states have internal predecessors, (53547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 53547 transitions. [2021-08-21 18:59:17,667 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 53547 transitions. Word has length 35 [2021-08-21 18:59:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:17,667 INFO L470 AbstractCegarLoop]: Abstraction has 21403 states and 53547 transitions. [2021-08-21 18:59:17,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 53547 transitions. [2021-08-21 18:59:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:17,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:17,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:17,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 18:59:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:17,905 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1418210788, now seen corresponding path program 4 times [2021-08-21 18:59:17,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:17,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391457353] [2021-08-21 18:59:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:17,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:17,959 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 18:59:17,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:17,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391457353] [2021-08-21 18:59:17,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391457353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:17,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379690930] [2021-08-21 18:59:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:17,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:17,960 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 18:59:17,961 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 18:59:21,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:21,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:21,473 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 18:59:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379690930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:21,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114972002] [2021-08-21 18:59:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:21,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:21,474 INFO L87 Difference]: Start difference. First operand 21403 states and 53547 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:21,625 INFO L93 Difference]: Finished difference Result 23722 states and 58653 transitions. [2021-08-21 18:59:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:21,672 INFO L225 Difference]: With dead ends: 23722 [2021-08-21 18:59:21,672 INFO L226 Difference]: Without dead ends: 23713 [2021-08-21 18:59:21,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23713 states. [2021-08-21 18:59:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23713 to 21436. [2021-08-21 18:59:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21436 states, 21435 states have (on average 2.5042220667133193) internal successors, (53678), 21435 states have internal predecessors, (53678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21436 states to 21436 states and 53678 transitions. [2021-08-21 18:59:22,021 INFO L78 Accepts]: Start accepts. Automaton has 21436 states and 53678 transitions. Word has length 35 [2021-08-21 18:59:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:22,022 INFO L470 AbstractCegarLoop]: Abstraction has 21436 states and 53678 transitions. [2021-08-21 18:59:22,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21436 states and 53678 transitions. [2021-08-21 18:59:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:22,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:22,054 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, 1, 1, 1] [2021-08-21 18:59:22,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 18:59:22,256 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,SelfDestructingSolverStorable221 [2021-08-21 18:59:22,257 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash -816837188, now seen corresponding path program 5 times [2021-08-21 18:59:22,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:22,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415100390] [2021-08-21 18:59:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:22,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:22,311 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 18:59:22,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:22,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415100390] [2021-08-21 18:59:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415100390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:22,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376517552] [2021-08-21 18:59:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:22,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:22,312 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 18:59:22,313 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 18:59:25,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:25,765 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 18:59:25,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376517552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:25,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:25,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:25,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381275052] [2021-08-21 18:59:25,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:25,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:25,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:25,766 INFO L87 Difference]: Start difference. First operand 21436 states and 53678 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:25,922 INFO L93 Difference]: Finished difference Result 23345 states and 57881 transitions. [2021-08-21 18:59:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:25,967 INFO L225 Difference]: With dead ends: 23345 [2021-08-21 18:59:25,967 INFO L226 Difference]: Without dead ends: 23336 [2021-08-21 18:59:25,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23336 states. [2021-08-21 18:59:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23336 to 21472. [2021-08-21 18:59:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21472 states, 21471 states have (on average 2.5068231568161705) internal successors, (53824), 21471 states have internal predecessors, (53824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21472 states to 21472 states and 53824 transitions. [2021-08-21 18:59:26,305 INFO L78 Accepts]: Start accepts. Automaton has 21472 states and 53824 transitions. Word has length 35 [2021-08-21 18:59:26,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:26,305 INFO L470 AbstractCegarLoop]: Abstraction has 21472 states and 53824 transitions. [2021-08-21 18:59:26,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:26,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21472 states and 53824 transitions. [2021-08-21 18:59:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:26,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:26,339 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:26,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 18:59:26,539 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,SelfDestructingSolverStorable222 [2021-08-21 18:59:26,539 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash 36935864, now seen corresponding path program 5 times [2021-08-21 18:59:26,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:26,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002467265] [2021-08-21 18:59:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:26,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:26,594 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 18:59:26,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002467265] [2021-08-21 18:59:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002467265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255578237] [2021-08-21 18:59:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:26,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:26,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:26,596 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 18:59:26,596 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 18:59:29,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:30,096 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 18:59:30,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255578237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:30,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:30,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:30,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580434806] [2021-08-21 18:59:30,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:30,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:30,097 INFO L87 Difference]: Start difference. First operand 21472 states and 53824 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:30,254 INFO L93 Difference]: Finished difference Result 23400 states and 58067 transitions. [2021-08-21 18:59:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:30,318 INFO L225 Difference]: With dead ends: 23400 [2021-08-21 18:59:30,318 INFO L226 Difference]: Without dead ends: 23391 [2021-08-21 18:59:30,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 18:59:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23391 states. [2021-08-21 18:59:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23391 to 21508. [2021-08-21 18:59:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 2.5090435672106755) internal successors, (53962), 21507 states have internal predecessors, (53962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 53962 transitions. [2021-08-21 18:59:30,720 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 53962 transitions. Word has length 35 [2021-08-21 18:59:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:30,720 INFO L470 AbstractCegarLoop]: Abstraction has 21508 states and 53962 transitions. [2021-08-21 18:59:30,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 53962 transitions. [2021-08-21 18:59:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:30,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:30,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:30,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 18:59:30,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 18:59:30,956 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 157094072, now seen corresponding path program 6 times [2021-08-21 18:59:30,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:30,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630765624] [2021-08-21 18:59:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:30,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:31,020 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 18:59:31,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:31,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630765624] [2021-08-21 18:59:31,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630765624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:31,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685537255] [2021-08-21 18:59:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:31,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:31,021 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 18:59:31,021 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 18:59:34,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:34,438 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 18:59:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685537255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:34,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:34,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:34,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217826139] [2021-08-21 18:59:34,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:34,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:34,439 INFO L87 Difference]: Start difference. First operand 21508 states and 53962 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:34,603 INFO L93 Difference]: Finished difference Result 23321 states and 57924 transitions. [2021-08-21 18:59:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:34,656 INFO L225 Difference]: With dead ends: 23321 [2021-08-21 18:59:34,656 INFO L226 Difference]: Without dead ends: 23312 [2021-08-21 18:59:34,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23312 states. [2021-08-21 18:59:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23312 to 21536. [2021-08-21 18:59:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21536 states, 21535 states have (on average 2.5119108428140238) internal successors, (54094), 21535 states have internal predecessors, (54094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21536 states to 21536 states and 54094 transitions. [2021-08-21 18:59:34,993 INFO L78 Accepts]: Start accepts. Automaton has 21536 states and 54094 transitions. Word has length 35 [2021-08-21 18:59:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:34,993 INFO L470 AbstractCegarLoop]: Abstraction has 21536 states and 54094 transitions. [2021-08-21 18:59:34,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21536 states and 54094 transitions. [2021-08-21 18:59:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:35,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:35,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:35,053 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 18:59:35,228 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,SelfDestructingSolverStorable224 [2021-08-21 18:59:35,228 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 270371508, now seen corresponding path program 6 times [2021-08-21 18:59:35,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168341797] [2021-08-21 18:59:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:35,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:35,283 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 18:59:35,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:35,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168341797] [2021-08-21 18:59:35,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168341797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:35,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872098538] [2021-08-21 18:59:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:35,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:35,284 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 18:59:35,285 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 18:59:38,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:38,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:38,933 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 18:59:38,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872098538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:38,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:38,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:38,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63247846] [2021-08-21 18:59:38,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:38,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:38,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:38,934 INFO L87 Difference]: Start difference. First operand 21536 states and 54094 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:39,083 INFO L93 Difference]: Finished difference Result 23356 states and 58064 transitions. [2021-08-21 18:59:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:39,129 INFO L225 Difference]: With dead ends: 23356 [2021-08-21 18:59:39,129 INFO L226 Difference]: Without dead ends: 23347 [2021-08-21 18:59:39,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23347 states. [2021-08-21 18:59:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23347 to 21564. [2021-08-21 18:59:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21564 states, 21563 states have (on average 2.5143996660946994) internal successors, (54218), 21563 states have internal predecessors, (54218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21564 states to 21564 states and 54218 transitions. [2021-08-21 18:59:39,458 INFO L78 Accepts]: Start accepts. Automaton has 21564 states and 54218 transitions. Word has length 35 [2021-08-21 18:59:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:39,458 INFO L470 AbstractCegarLoop]: Abstraction has 21564 states and 54218 transitions. [2021-08-21 18:59:39,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 21564 states and 54218 transitions. [2021-08-21 18:59:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:39,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:39,490 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 18:59:39,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 18:59:39,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:39,691 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash -610864394, now seen corresponding path program 3 times [2021-08-21 18:59:39,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:39,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33997143] [2021-08-21 18:59:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:39,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:39,747 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 18:59:39,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33997143] [2021-08-21 18:59:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33997143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782850606] [2021-08-21 18:59:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:39,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:39,749 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 18:59:39,749 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 18:59:43,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:43,221 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 18:59:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782850606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:43,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716023397] [2021-08-21 18:59:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:43,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:43,222 INFO L87 Difference]: Start difference. First operand 21564 states and 54218 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:43,365 INFO L93 Difference]: Finished difference Result 23948 states and 59366 transitions. [2021-08-21 18:59:43,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:43,414 INFO L225 Difference]: With dead ends: 23948 [2021-08-21 18:59:43,414 INFO L226 Difference]: Without dead ends: 23939 [2021-08-21 18:59:43,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23939 states. [2021-08-21 18:59:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23939 to 21615. [2021-08-21 18:59:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21615 states, 21614 states have (on average 2.51730359951883) internal successors, (54409), 21614 states have internal predecessors, (54409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21615 states to 21615 states and 54409 transitions. [2021-08-21 18:59:43,744 INFO L78 Accepts]: Start accepts. Automaton has 21615 states and 54409 transitions. Word has length 35 [2021-08-21 18:59:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:43,744 INFO L470 AbstractCegarLoop]: Abstraction has 21615 states and 54409 transitions. [2021-08-21 18:59:43,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 21615 states and 54409 transitions. [2021-08-21 18:59:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:43,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:43,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:43,803 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 18:59:43,977 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,SelfDestructingSolverStorable226 [2021-08-21 18:59:43,977 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 893731908, now seen corresponding path program 3 times [2021-08-21 18:59:43,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:43,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841035171] [2021-08-21 18:59:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:43,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:44,031 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 18:59:44,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:44,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841035171] [2021-08-21 18:59:44,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841035171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:44,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672773361] [2021-08-21 18:59:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:44,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:44,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:44,032 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 18:59:44,032 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 18:59:47,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:47,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:47,508 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 18:59:47,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672773361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:47,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:47,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:47,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825006518] [2021-08-21 18:59:47,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:47,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:47,509 INFO L87 Difference]: Start difference. First operand 21615 states and 54409 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:47,655 INFO L93 Difference]: Finished difference Result 23946 states and 59512 transitions. [2021-08-21 18:59:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:47,699 INFO L225 Difference]: With dead ends: 23946 [2021-08-21 18:59:47,699 INFO L226 Difference]: Without dead ends: 23937 [2021-08-21 18:59:47,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23937 states. [2021-08-21 18:59:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23937 to 21653. [2021-08-21 18:59:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21653 states, 21652 states have (on average 2.5204138185848883) internal successors, (54572), 21652 states have internal predecessors, (54572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21653 states to 21653 states and 54572 transitions. [2021-08-21 18:59:48,097 INFO L78 Accepts]: Start accepts. Automaton has 21653 states and 54572 transitions. Word has length 35 [2021-08-21 18:59:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:48,097 INFO L470 AbstractCegarLoop]: Abstraction has 21653 states and 54572 transitions. [2021-08-21 18:59:48,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21653 states and 54572 transitions. [2021-08-21 18:59:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:48,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:48,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:48,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 18:59:48,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:48,333 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1260120004, now seen corresponding path program 3 times [2021-08-21 18:59:48,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:48,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559112130] [2021-08-21 18:59:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:48,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:48,386 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 18:59:48,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:48,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559112130] [2021-08-21 18:59:48,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559112130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:48,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882462292] [2021-08-21 18:59:48,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:48,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:48,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:48,387 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 18:59:48,388 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 18:59:51,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:51,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:52,007 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 18:59:52,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882462292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:52,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:52,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:52,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850003349] [2021-08-21 18:59:52,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:52,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:52,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:52,008 INFO L87 Difference]: Start difference. First operand 21653 states and 54572 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:52,152 INFO L93 Difference]: Finished difference Result 23795 states and 59092 transitions. [2021-08-21 18:59:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:52,196 INFO L225 Difference]: With dead ends: 23795 [2021-08-21 18:59:52,196 INFO L226 Difference]: Without dead ends: 23786 [2021-08-21 18:59:52,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23786 states. [2021-08-21 18:59:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23786 to 21672. [2021-08-21 18:59:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21672 states, 21671 states have (on average 2.5217571870241335) internal successors, (54649), 21671 states have internal predecessors, (54649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21672 states to 21672 states and 54649 transitions. [2021-08-21 18:59:52,509 INFO L78 Accepts]: Start accepts. Automaton has 21672 states and 54649 transitions. Word has length 35 [2021-08-21 18:59:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 21672 states and 54649 transitions. [2021-08-21 18:59:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21672 states and 54649 transitions. [2021-08-21 18:59:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:52,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:52,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:52,566 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 18:59:52,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:52,741 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1389924840, now seen corresponding path program 3 times [2021-08-21 18:59:52,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:52,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745421176] [2021-08-21 18:59:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:52,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:52,795 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 18:59:52,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:52,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745421176] [2021-08-21 18:59:52,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745421176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:52,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039033293] [2021-08-21 18:59:52,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:52,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:52,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:52,796 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 18:59:52,797 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 18:59:56,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:56,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:59:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:56,329 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 18:59:56,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039033293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:56,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:56,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:59:56,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931966184] [2021-08-21 18:59:56,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:59:56,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:59:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:59:56,330 INFO L87 Difference]: Start difference. First operand 21672 states and 54649 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:56,474 INFO L93 Difference]: Finished difference Result 23949 states and 59272 transitions. [2021-08-21 18:59:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:59:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:56,519 INFO L225 Difference]: With dead ends: 23949 [2021-08-21 18:59:56,519 INFO L226 Difference]: Without dead ends: 23936 [2021-08-21 18:59:56,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 18:59:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23936 states. [2021-08-21 18:59:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23936 to 21697. [2021-08-21 18:59:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21697 states, 21696 states have (on average 2.52272308259587) internal successors, (54733), 21696 states have internal predecessors, (54733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21697 states to 21697 states and 54733 transitions. [2021-08-21 18:59:56,849 INFO L78 Accepts]: Start accepts. Automaton has 21697 states and 54733 transitions. Word has length 35 [2021-08-21 18:59:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:56,849 INFO L470 AbstractCegarLoop]: Abstraction has 21697 states and 54733 transitions. [2021-08-21 18:59:56,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 18:59:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21697 states and 54733 transitions. [2021-08-21 18:59:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:59:56,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:56,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:56,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 18:59:57,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:57,082 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 18:59:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash 67222808, now seen corresponding path program 4 times [2021-08-21 18:59:57,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:57,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731587394] [2021-08-21 18:59:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:57,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:57,191 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 18:59:57,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:57,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731587394] [2021-08-21 18:59:57,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731587394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:57,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248103911] [2021-08-21 18:59:57,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:57,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:57,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:57,193 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 18:59:57,193 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 19:00:00,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:00,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:00,798 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 19:00:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248103911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:00,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:00,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388843407] [2021-08-21 19:00:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:00,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:00,799 INFO L87 Difference]: Start difference. First operand 21697 states and 54733 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:00,945 INFO L93 Difference]: Finished difference Result 24116 states and 60039 transitions. [2021-08-21 19:00:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:00,990 INFO L225 Difference]: With dead ends: 24116 [2021-08-21 19:00:00,991 INFO L226 Difference]: Without dead ends: 24107 [2021-08-21 19:00:00,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-08-21 19:00:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 21740. [2021-08-21 19:00:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21740 states, 21739 states have (on average 2.5259671558029346) internal successors, (54912), 21739 states have internal predecessors, (54912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21740 states to 21740 states and 54912 transitions. [2021-08-21 19:00:01,314 INFO L78 Accepts]: Start accepts. Automaton has 21740 states and 54912 transitions. Word has length 35 [2021-08-21 19:00:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:01,314 INFO L470 AbstractCegarLoop]: Abstraction has 21740 states and 54912 transitions. [2021-08-21 19:00:01,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 21740 states and 54912 transitions. [2021-08-21 19:00:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:01,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:01,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:01,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 19:00:01,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:01,552 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1782027072, now seen corresponding path program 5 times [2021-08-21 19:00:01,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:01,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490145222] [2021-08-21 19:00:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:01,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:01,619 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 19:00:01,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490145222] [2021-08-21 19:00:01,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490145222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369341513] [2021-08-21 19:00:01,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:01,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:01,620 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 19:00:01,620 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 19:00:05,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:05,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:05,577 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 19:00:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369341513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:05,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:05,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:05,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297911303] [2021-08-21 19:00:05,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:05,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:05,578 INFO L87 Difference]: Start difference. First operand 21740 states and 54912 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:05,750 INFO L93 Difference]: Finished difference Result 23797 states and 59432 transitions. [2021-08-21 19:00:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:05,800 INFO L225 Difference]: With dead ends: 23797 [2021-08-21 19:00:05,800 INFO L226 Difference]: Without dead ends: 23788 [2021-08-21 19:00:05,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23788 states. [2021-08-21 19:00:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23788 to 21785. [2021-08-21 19:00:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21785 states, 21784 states have (on average 2.5291957399926552) internal successors, (55096), 21784 states have internal predecessors, (55096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 55096 transitions. [2021-08-21 19:00:06,158 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 55096 transitions. Word has length 35 [2021-08-21 19:00:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:06,158 INFO L470 AbstractCegarLoop]: Abstraction has 21785 states and 55096 transitions. [2021-08-21 19:00:06,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 55096 transitions. [2021-08-21 19:00:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:06,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:06,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:06,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-21 19:00:06,393 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,SelfDestructingSolverStorable231 [2021-08-21 19:00:06,393 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1659167172, now seen corresponding path program 5 times [2021-08-21 19:00:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:06,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137274115] [2021-08-21 19:00:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:06,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:06,454 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 19:00:06,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:06,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137274115] [2021-08-21 19:00:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137274115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:06,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131391235] [2021-08-21 19:00:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:06,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:06,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:06,457 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 19:00:06,462 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 19:00:10,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:10,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:10,317 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 19:00:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131391235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:10,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:10,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:10,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271356307] [2021-08-21 19:00:10,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:10,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:10,318 INFO L87 Difference]: Start difference. First operand 21785 states and 55096 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:10,473 INFO L93 Difference]: Finished difference Result 23864 states and 59670 transitions. [2021-08-21 19:00:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:10,519 INFO L225 Difference]: With dead ends: 23864 [2021-08-21 19:00:10,520 INFO L226 Difference]: Without dead ends: 23855 [2021-08-21 19:00:10,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23855 states. [2021-08-21 19:00:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23855 to 21830. [2021-08-21 19:00:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21830 states, 21829 states have (on average 2.5319529066837694) internal successors, (55270), 21829 states have internal predecessors, (55270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21830 states to 21830 states and 55270 transitions. [2021-08-21 19:00:10,864 INFO L78 Accepts]: Start accepts. Automaton has 21830 states and 55270 transitions. Word has length 35 [2021-08-21 19:00:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 21830 states and 55270 transitions. [2021-08-21 19:00:10,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21830 states and 55270 transitions. [2021-08-21 19:00:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:10,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:10,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:10,928 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 19:00:11,099 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,SelfDestructingSolverStorable232 [2021-08-21 19:00:11,100 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1539008964, now seen corresponding path program 6 times [2021-08-21 19:00:11,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:11,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320140512] [2021-08-21 19:00:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:11,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:11,172 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 19:00:11,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320140512] [2021-08-21 19:00:11,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320140512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:11,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551081524] [2021-08-21 19:00:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:11,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:11,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:11,173 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 19:00:11,174 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 19:00:14,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:00:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:15,054 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 19:00:15,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551081524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:15,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:15,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:15,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196320788] [2021-08-21 19:00:15,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:15,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:15,055 INFO L87 Difference]: Start difference. First operand 21830 states and 55270 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:15,229 INFO L93 Difference]: Finished difference Result 23767 states and 59487 transitions. [2021-08-21 19:00:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:15,280 INFO L225 Difference]: With dead ends: 23767 [2021-08-21 19:00:15,280 INFO L226 Difference]: Without dead ends: 23758 [2021-08-21 19:00:15,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23758 states. [2021-08-21 19:00:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23758 to 21865. [2021-08-21 19:00:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21865 states, 21864 states have (on average 2.5354006586169047) internal successors, (55434), 21864 states have internal predecessors, (55434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21865 states to 21865 states and 55434 transitions. [2021-08-21 19:00:15,621 INFO L78 Accepts]: Start accepts. Automaton has 21865 states and 55434 transitions. Word has length 35 [2021-08-21 19:00:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:15,621 INFO L470 AbstractCegarLoop]: Abstraction has 21865 states and 55434 transitions. [2021-08-21 19:00:15,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 21865 states and 55434 transitions. [2021-08-21 19:00:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:15,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:15,660 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, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:15,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 19:00:15,860 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,SelfDestructingSolverStorable233 [2021-08-21 19:00:15,860 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1425731528, now seen corresponding path program 6 times [2021-08-21 19:00:15,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:15,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029114101] [2021-08-21 19:00:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:15,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:15,918 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 19:00:15,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:15,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029114101] [2021-08-21 19:00:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029114101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:15,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21383129] [2021-08-21 19:00:15,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:15,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:15,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:15,919 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 19:00:15,920 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 19:00:19,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:00:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:19,922 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 19:00:19,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21383129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:19,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:19,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:19,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800877618] [2021-08-21 19:00:19,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:19,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:19,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:19,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:19,923 INFO L87 Difference]: Start difference. First operand 21865 states and 55434 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:20,109 INFO L93 Difference]: Finished difference Result 23809 states and 59661 transitions. [2021-08-21 19:00:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:20,157 INFO L225 Difference]: With dead ends: 23809 [2021-08-21 19:00:20,157 INFO L226 Difference]: Without dead ends: 23800 [2021-08-21 19:00:20,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23800 states. [2021-08-21 19:00:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23800 to 21900. [2021-08-21 19:00:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21900 states, 21899 states have (on average 2.53838074797936) internal successors, (55588), 21899 states have internal predecessors, (55588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21900 states to 21900 states and 55588 transitions. [2021-08-21 19:00:20,534 INFO L78 Accepts]: Start accepts. Automaton has 21900 states and 55588 transitions. Word has length 35 [2021-08-21 19:00:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:20,534 INFO L470 AbstractCegarLoop]: Abstraction has 21900 states and 55588 transitions. [2021-08-21 19:00:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21900 states and 55588 transitions. [2021-08-21 19:00:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:20,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:20,578 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 19:00:20,608 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 19:00:20,778 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,SelfDestructingSolverStorable234 [2021-08-21 19:00:20,778 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:20,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1292794436, now seen corresponding path program 3 times [2021-08-21 19:00:20,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:20,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286284985] [2021-08-21 19:00:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:20,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:20,835 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 19:00:20,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:20,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286284985] [2021-08-21 19:00:20,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286284985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:20,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182825137] [2021-08-21 19:00:20,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:20,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:20,836 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 19:00:20,837 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 19:00:24,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:24,691 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 19:00:24,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182825137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:24,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:24,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:24,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101151856] [2021-08-21 19:00:24,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:24,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:24,692 INFO L87 Difference]: Start difference. First operand 21900 states and 55588 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:24,845 INFO L93 Difference]: Finished difference Result 24317 states and 60775 transitions. [2021-08-21 19:00:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:24,899 INFO L225 Difference]: With dead ends: 24317 [2021-08-21 19:00:24,899 INFO L226 Difference]: Without dead ends: 24308 [2021-08-21 19:00:24,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24308 states. [2021-08-21 19:00:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24308 to 21959. [2021-08-21 19:00:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21959 states, 21958 states have (on average 2.5410784224428453) internal successors, (55797), 21958 states have internal predecessors, (55797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21959 states to 21959 states and 55797 transitions. [2021-08-21 19:00:25,270 INFO L78 Accepts]: Start accepts. Automaton has 21959 states and 55797 transitions. Word has length 35 [2021-08-21 19:00:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:25,270 INFO L470 AbstractCegarLoop]: Abstraction has 21959 states and 55797 transitions. [2021-08-21 19:00:25,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 21959 states and 55797 transitions. [2021-08-21 19:00:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:25,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:25,308 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:25,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 19:00:25,509 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,SelfDestructingSolverStorable235 [2021-08-21 19:00:25,509 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 407234500, now seen corresponding path program 1 times [2021-08-21 19:00:25,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:25,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216308349] [2021-08-21 19:00:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:25,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:25,569 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 19:00:25,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:25,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216308349] [2021-08-21 19:00:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216308349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:00:25,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:00:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:00:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061524734] [2021-08-21 19:00:25,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:25,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:25,570 INFO L87 Difference]: Start difference. First operand 21959 states and 55797 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:25,753 INFO L93 Difference]: Finished difference Result 24502 states and 61288 transitions. [2021-08-21 19:00:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:25,804 INFO L225 Difference]: With dead ends: 24502 [2021-08-21 19:00:25,805 INFO L226 Difference]: Without dead ends: 24493 [2021-08-21 19:00:25,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24493 states. [2021-08-21 19:00:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24493 to 22086. [2021-08-21 19:00:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22086 states, 22085 states have (on average 2.545302241340276) internal successors, (56213), 22085 states have internal predecessors, (56213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22086 states to 22086 states and 56213 transitions. [2021-08-21 19:00:26,158 INFO L78 Accepts]: Start accepts. Automaton has 22086 states and 56213 transitions. Word has length 35 [2021-08-21 19:00:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:26,158 INFO L470 AbstractCegarLoop]: Abstraction has 22086 states and 56213 transitions. [2021-08-21 19:00:26,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22086 states and 56213 transitions. [2021-08-21 19:00:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:26,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:26,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:26,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-08-21 19:00:26,194 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2052156952, now seen corresponding path program 1 times [2021-08-21 19:00:26,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:26,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486577340] [2021-08-21 19:00:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:26,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:26,251 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 19:00:26,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:26,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486577340] [2021-08-21 19:00:26,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486577340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:00:26,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:00:26,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:00:26,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752007180] [2021-08-21 19:00:26,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:26,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:26,252 INFO L87 Difference]: Start difference. First operand 22086 states and 56213 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:26,410 INFO L93 Difference]: Finished difference Result 24751 states and 61712 transitions. [2021-08-21 19:00:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:26,464 INFO L225 Difference]: With dead ends: 24751 [2021-08-21 19:00:26,464 INFO L226 Difference]: Without dead ends: 24738 [2021-08-21 19:00:26,464 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 19:00:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24738 states. [2021-08-21 19:00:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24738 to 22215. [2021-08-21 19:00:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 2.54501665616278) internal successors, (56535), 22214 states have internal predecessors, (56535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 56535 transitions. [2021-08-21 19:00:26,907 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 56535 transitions. Word has length 35 [2021-08-21 19:00:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:26,907 INFO L470 AbstractCegarLoop]: Abstraction has 22215 states and 56535 transitions. [2021-08-21 19:00:26,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 56535 transitions. [2021-08-21 19:00:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:26,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:26,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:26,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-08-21 19:00:26,942 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash -785662696, now seen corresponding path program 1 times [2021-08-21 19:00:26,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:26,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394592627] [2021-08-21 19:00:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:26,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:26,999 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 19:00:27,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:27,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394592627] [2021-08-21 19:00:27,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394592627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:00:27,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:00:27,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:00:27,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387606326] [2021-08-21 19:00:27,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:27,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:27,000 INFO L87 Difference]: Start difference. First operand 22215 states and 56535 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:27,153 INFO L93 Difference]: Finished difference Result 25008 states and 62685 transitions. [2021-08-21 19:00:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:27,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:27,207 INFO L225 Difference]: With dead ends: 25008 [2021-08-21 19:00:27,207 INFO L226 Difference]: Without dead ends: 24999 [2021-08-21 19:00:27,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 19:00:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24999 states. [2021-08-21 19:00:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24999 to 22326. [2021-08-21 19:00:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22326 states, 22325 states have (on average 2.5504143337066068) internal successors, (56938), 22325 states have internal predecessors, (56938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22326 states to 22326 states and 56938 transitions. [2021-08-21 19:00:27,565 INFO L78 Accepts]: Start accepts. Automaton has 22326 states and 56938 transitions. Word has length 35 [2021-08-21 19:00:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 22326 states and 56938 transitions. [2021-08-21 19:00:27,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22326 states and 56938 transitions. [2021-08-21 19:00:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:27,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:27,600 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 19:00:27,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-08-21 19:00:27,600 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:27,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2128140092, now seen corresponding path program 3 times [2021-08-21 19:00:27,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:27,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299156515] [2021-08-21 19:00:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:27,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:27,661 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 19:00:27,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299156515] [2021-08-21 19:00:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299156515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:27,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688492535] [2021-08-21 19:00:27,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:27,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:27,662 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 19:00:27,662 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 19:00:31,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:31,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:31,472 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 19:00:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688492535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:31,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712776697] [2021-08-21 19:00:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:31,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:31,473 INFO L87 Difference]: Start difference. First operand 22326 states and 56938 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:31,649 INFO L93 Difference]: Finished difference Result 24753 states and 62112 transitions. [2021-08-21 19:00:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:31,702 INFO L225 Difference]: With dead ends: 24753 [2021-08-21 19:00:31,703 INFO L226 Difference]: Without dead ends: 24744 [2021-08-21 19:00:31,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24744 states. [2021-08-21 19:00:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24744 to 22394. [2021-08-21 19:00:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22394 states, 22393 states have (on average 2.552895994283928) internal successors, (57167), 22393 states have internal predecessors, (57167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22394 states to 22394 states and 57167 transitions. [2021-08-21 19:00:32,063 INFO L78 Accepts]: Start accepts. Automaton has 22394 states and 57167 transitions. Word has length 35 [2021-08-21 19:00:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:32,063 INFO L470 AbstractCegarLoop]: Abstraction has 22394 states and 57167 transitions. [2021-08-21 19:00:32,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22394 states and 57167 transitions. [2021-08-21 19:00:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:32,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:32,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:32,126 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 19:00:32,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:32,299 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2000953528, now seen corresponding path program 2 times [2021-08-21 19:00:32,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:32,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377008904] [2021-08-21 19:00:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:32,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:32,361 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 19:00:32,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377008904] [2021-08-21 19:00:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377008904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505985564] [2021-08-21 19:00:32,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:32,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:32,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:32,363 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 19:00:32,363 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 19:00:36,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:36,433 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 19:00:36,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505985564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:36,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:36,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:36,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468717422] [2021-08-21 19:00:36,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:36,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:36,434 INFO L87 Difference]: Start difference. First operand 22394 states and 57167 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:36,589 INFO L93 Difference]: Finished difference Result 24680 states and 62010 transitions. [2021-08-21 19:00:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:36,648 INFO L225 Difference]: With dead ends: 24680 [2021-08-21 19:00:36,648 INFO L226 Difference]: Without dead ends: 24671 [2021-08-21 19:00:36,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24671 states. [2021-08-21 19:00:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24671 to 22444. [2021-08-21 19:00:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22444 states, 22443 states have (on average 2.5549614579156086) internal successors, (57341), 22443 states have internal predecessors, (57341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22444 states to 22444 states and 57341 transitions. [2021-08-21 19:00:37,026 INFO L78 Accepts]: Start accepts. Automaton has 22444 states and 57341 transitions. Word has length 35 [2021-08-21 19:00:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:37,026 INFO L470 AbstractCegarLoop]: Abstraction has 22444 states and 57341 transitions. [2021-08-21 19:00:37,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22444 states and 57341 transitions. [2021-08-21 19:00:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:37,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:37,060 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 19:00:37,091 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 19:00:37,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:37,261 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:37,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1873766964, now seen corresponding path program 2 times [2021-08-21 19:00:37,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:37,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194169110] [2021-08-21 19:00:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:37,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:37,375 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 19:00:37,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:37,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194169110] [2021-08-21 19:00:37,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194169110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:37,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711625721] [2021-08-21 19:00:37,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:37,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:37,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:37,376 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 19:00:37,376 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 19:00:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:41,338 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 19:00:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711625721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:41,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:41,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:41,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554747302] [2021-08-21 19:00:41,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:41,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:41,339 INFO L87 Difference]: Start difference. First operand 22444 states and 57341 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:41,500 INFO L93 Difference]: Finished difference Result 24816 states and 62297 transitions. [2021-08-21 19:00:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:41,558 INFO L225 Difference]: With dead ends: 24816 [2021-08-21 19:00:41,558 INFO L226 Difference]: Without dead ends: 24807 [2021-08-21 19:00:41,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24807 states. [2021-08-21 19:00:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24807 to 22497. [2021-08-21 19:00:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22497 states, 22496 states have (on average 2.5560099573257467) internal successors, (57500), 22496 states have internal predecessors, (57500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22497 states to 22497 states and 57500 transitions. [2021-08-21 19:00:41,930 INFO L78 Accepts]: Start accepts. Automaton has 22497 states and 57500 transitions. Word has length 35 [2021-08-21 19:00:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:41,930 INFO L470 AbstractCegarLoop]: Abstraction has 22497 states and 57500 transitions. [2021-08-21 19:00:41,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22497 states and 57500 transitions. [2021-08-21 19:00:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:41,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:41,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:41,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 19:00:42,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:42,164 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash 620696144, now seen corresponding path program 4 times [2021-08-21 19:00:42,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:42,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110847919] [2021-08-21 19:00:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:42,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:42,219 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 19:00:42,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:42,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110847919] [2021-08-21 19:00:42,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110847919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:42,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248324887] [2021-08-21 19:00:42,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:42,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:42,221 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 19:00:42,221 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 19:00:46,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:46,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:46,240 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 19:00:46,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248324887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:46,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:46,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:46,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395904629] [2021-08-21 19:00:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:46,241 INFO L87 Difference]: Start difference. First operand 22497 states and 57500 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:46,404 INFO L93 Difference]: Finished difference Result 24803 states and 62485 transitions. [2021-08-21 19:00:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:46,458 INFO L225 Difference]: With dead ends: 24803 [2021-08-21 19:00:46,458 INFO L226 Difference]: Without dead ends: 24794 [2021-08-21 19:00:46,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24794 states. [2021-08-21 19:00:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24794 to 22526. [2021-08-21 19:00:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22526 states, 22525 states have (on average 2.5581798002219758) internal successors, (57623), 22525 states have internal predecessors, (57623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22526 states to 22526 states and 57623 transitions. [2021-08-21 19:00:46,823 INFO L78 Accepts]: Start accepts. Automaton has 22526 states and 57623 transitions. Word has length 35 [2021-08-21 19:00:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:46,823 INFO L470 AbstractCegarLoop]: Abstraction has 22526 states and 57623 transitions. [2021-08-21 19:00:46,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 22526 states and 57623 transitions. [2021-08-21 19:00:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:46,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:46,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:46,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 19:00:47,059 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,SelfDestructingSolverStorable242 [2021-08-21 19:00:47,060 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash 875069272, now seen corresponding path program 4 times [2021-08-21 19:00:47,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:47,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090675940] [2021-08-21 19:00:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:47,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:47,116 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 19:00:47,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:47,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090675940] [2021-08-21 19:00:47,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090675940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:47,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600080029] [2021-08-21 19:00:47,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:47,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:47,117 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 19:00:47,118 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 19:00:50,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:50,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:50,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:51,155 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 19:00:51,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600080029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:51,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:51,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:51,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412618247] [2021-08-21 19:00:51,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:51,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:51,156 INFO L87 Difference]: Start difference. First operand 22526 states and 57623 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:51,319 INFO L93 Difference]: Finished difference Result 24703 states and 62274 transitions. [2021-08-21 19:00:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:51,374 INFO L225 Difference]: With dead ends: 24703 [2021-08-21 19:00:51,374 INFO L226 Difference]: Without dead ends: 24694 [2021-08-21 19:00:51,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24694 states. [2021-08-21 19:00:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24694 to 22535. [2021-08-21 19:00:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22535 states, 22534 states have (on average 2.558977545043046) internal successors, (57664), 22534 states have internal predecessors, (57664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22535 states to 22535 states and 57664 transitions. [2021-08-21 19:00:51,740 INFO L78 Accepts]: Start accepts. Automaton has 22535 states and 57664 transitions. Word has length 35 [2021-08-21 19:00:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:51,741 INFO L470 AbstractCegarLoop]: Abstraction has 22535 states and 57664 transitions. [2021-08-21 19:00:51,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22535 states and 57664 transitions. [2021-08-21 19:00:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:51,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:51,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:51,840 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 19:00:52,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:52,005 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1002255836, now seen corresponding path program 4 times [2021-08-21 19:00:52,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:52,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65903242] [2021-08-21 19:00:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:52,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:52,087 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 19:00:52,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:52,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65903242] [2021-08-21 19:00:52,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65903242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:52,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665564891] [2021-08-21 19:00:52,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:52,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:52,088 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 19:00:52,089 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 19:00:56,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:56,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:00:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:56,273 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 19:00:56,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665564891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:56,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:56,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:00:56,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71340820] [2021-08-21 19:00:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:00:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:00:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:00:56,274 INFO L87 Difference]: Start difference. First operand 22535 states and 57664 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:56,444 INFO L93 Difference]: Finished difference Result 24789 states and 62455 transitions. [2021-08-21 19:00:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:00:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:56,498 INFO L225 Difference]: With dead ends: 24789 [2021-08-21 19:00:56,498 INFO L226 Difference]: Without dead ends: 24780 [2021-08-21 19:00:56,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:00:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24780 states. [2021-08-21 19:00:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24780 to 22552. [2021-08-21 19:00:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22552 states, 22551 states have (on average 2.5598421356037426) internal successors, (57727), 22551 states have internal predecessors, (57727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22552 states to 22552 states and 57727 transitions. [2021-08-21 19:00:56,849 INFO L78 Accepts]: Start accepts. Automaton has 22552 states and 57727 transitions. Word has length 35 [2021-08-21 19:00:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:56,849 INFO L470 AbstractCegarLoop]: Abstraction has 22552 states and 57727 transitions. [2021-08-21 19:00:56,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:00:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22552 states and 57727 transitions. [2021-08-21 19:00:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:00:56,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:56,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:56,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:57,088 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:00:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1905405636, now seen corresponding path program 4 times [2021-08-21 19:00:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:57,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619710909] [2021-08-21 19:00:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:57,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:57,143 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 19:00:57,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:57,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619710909] [2021-08-21 19:00:57,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619710909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:57,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370830250] [2021-08-21 19:00:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:57,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:57,144 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 19:00:57,145 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 19:01:00,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:00,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:01,156 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 19:01:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370830250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:01,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636195252] [2021-08-21 19:01:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:01,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:01,157 INFO L87 Difference]: Start difference. First operand 22552 states and 57727 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:01,315 INFO L93 Difference]: Finished difference Result 24967 states and 62965 transitions. [2021-08-21 19:01:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:01,371 INFO L225 Difference]: With dead ends: 24967 [2021-08-21 19:01:01,371 INFO L226 Difference]: Without dead ends: 24958 [2021-08-21 19:01:01,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24958 states. [2021-08-21 19:01:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24958 to 22593. [2021-08-21 19:01:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22593 states, 22592 states have (on average 2.562898371104816) internal successors, (57901), 22592 states have internal predecessors, (57901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22593 states to 22593 states and 57901 transitions. [2021-08-21 19:01:01,706 INFO L78 Accepts]: Start accepts. Automaton has 22593 states and 57901 transitions. Word has length 35 [2021-08-21 19:01:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:01,706 INFO L470 AbstractCegarLoop]: Abstraction has 22593 states and 57901 transitions. [2021-08-21 19:01:01,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 22593 states and 57901 transitions. [2021-08-21 19:01:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:01,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:01,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:01,771 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 19:01:01,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 19:01:01,941 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:01,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1566483252, now seen corresponding path program 4 times [2021-08-21 19:01:01,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:01,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135921048] [2021-08-21 19:01:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:01,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:01,997 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 19:01:01,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135921048] [2021-08-21 19:01:01,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135921048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723802363] [2021-08-21 19:01:01,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:01,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:01,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:01,998 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 19:01:01,998 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 19:01:05,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:06,082 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 19:01:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723802363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:06,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:06,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:06,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731909316] [2021-08-21 19:01:06,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:06,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:06,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:06,083 INFO L87 Difference]: Start difference. First operand 22593 states and 57901 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:06,244 INFO L93 Difference]: Finished difference Result 24876 states and 62777 transitions. [2021-08-21 19:01:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:06,301 INFO L225 Difference]: With dead ends: 24876 [2021-08-21 19:01:06,301 INFO L226 Difference]: Without dead ends: 24867 [2021-08-21 19:01:06,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-08-21 19:01:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 22616. [2021-08-21 19:01:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22616 states, 22615 states have (on average 2.5648463409241655) internal successors, (58004), 22615 states have internal predecessors, (58004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22616 states to 22616 states and 58004 transitions. [2021-08-21 19:01:06,667 INFO L78 Accepts]: Start accepts. Automaton has 22616 states and 58004 transitions. Word has length 35 [2021-08-21 19:01:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:06,667 INFO L470 AbstractCegarLoop]: Abstraction has 22616 states and 58004 transitions. [2021-08-21 19:01:06,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22616 states and 58004 transitions. [2021-08-21 19:01:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:06,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:06,703 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, 1, 1, 1] [2021-08-21 19:01:06,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-21 19:01:06,904 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,SelfDestructingSolverStorable246 [2021-08-21 19:01:06,904 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:06,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1154944048, now seen corresponding path program 4 times [2021-08-21 19:01:06,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:06,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925276654] [2021-08-21 19:01:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:06,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:06,978 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 19:01:06,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:06,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925276654] [2021-08-21 19:01:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925276654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:06,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749890384] [2021-08-21 19:01:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:06,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:06,980 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 19:01:06,980 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 19:01:10,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:10,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:10,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:11,029 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 19:01:11,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749890384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:11,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:11,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:11,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611947751] [2021-08-21 19:01:11,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:11,030 INFO L87 Difference]: Start difference. First operand 22616 states and 58004 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:11,185 INFO L93 Difference]: Finished difference Result 24980 states and 63019 transitions. [2021-08-21 19:01:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:11,238 INFO L225 Difference]: With dead ends: 24980 [2021-08-21 19:01:11,238 INFO L226 Difference]: Without dead ends: 24971 [2021-08-21 19:01:11,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-08-21 19:01:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 22648. [2021-08-21 19:01:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22648 states, 22647 states have (on average 2.566830043714399) internal successors, (58131), 22647 states have internal predecessors, (58131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22648 states to 22648 states and 58131 transitions. [2021-08-21 19:01:11,605 INFO L78 Accepts]: Start accepts. Automaton has 22648 states and 58131 transitions. Word has length 35 [2021-08-21 19:01:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:11,605 INFO L470 AbstractCegarLoop]: Abstraction has 22648 states and 58131 transitions. [2021-08-21 19:01:11,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22648 states and 58131 transitions. [2021-08-21 19:01:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:11,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:11,643 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 19:01:11,669 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 19:01:11,843 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,SelfDestructingSolverStorable247 [2021-08-21 19:01:11,843 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:11,844 INFO L82 PathProgramCache]: Analyzing trace with hash -686941544, now seen corresponding path program 1 times [2021-08-21 19:01:11,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:11,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134161922] [2021-08-21 19:01:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:11,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:11,916 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 19:01:11,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134161922] [2021-08-21 19:01:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134161922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:11,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:11,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:01:11,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560041585] [2021-08-21 19:01:11,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:11,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:11,917 INFO L87 Difference]: Start difference. First operand 22648 states and 58131 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:12,062 INFO L93 Difference]: Finished difference Result 25153 states and 63148 transitions. [2021-08-21 19:01:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:12,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:12,119 INFO L225 Difference]: With dead ends: 25153 [2021-08-21 19:01:12,120 INFO L226 Difference]: Without dead ends: 25140 [2021-08-21 19:01:12,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 19:01:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25140 states. [2021-08-21 19:01:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25140 to 22777. [2021-08-21 19:01:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22777 states, 22776 states have (on average 2.5641903758342113) internal successors, (58402), 22776 states have internal predecessors, (58402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22777 states to 22777 states and 58402 transitions. [2021-08-21 19:01:12,500 INFO L78 Accepts]: Start accepts. Automaton has 22777 states and 58402 transitions. Word has length 35 [2021-08-21 19:01:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 22777 states and 58402 transitions. [2021-08-21 19:01:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22777 states and 58402 transitions. [2021-08-21 19:01:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:12,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:12,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:12,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-08-21 19:01:12,538 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:12,538 INFO L82 PathProgramCache]: Analyzing trace with hash 770206104, now seen corresponding path program 1 times [2021-08-21 19:01:12,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:12,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222387939] [2021-08-21 19:01:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:12,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:12,593 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 19:01:12,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:12,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222387939] [2021-08-21 19:01:12,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222387939] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:12,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:12,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:01:12,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107634841] [2021-08-21 19:01:12,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:12,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:12,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:12,593 INFO L87 Difference]: Start difference. First operand 22777 states and 58402 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:12,746 INFO L93 Difference]: Finished difference Result 25385 states and 63959 transitions. [2021-08-21 19:01:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:12,802 INFO L225 Difference]: With dead ends: 25385 [2021-08-21 19:01:12,803 INFO L226 Difference]: Without dead ends: 25376 [2021-08-21 19:01:12,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25376 states. [2021-08-21 19:01:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25376 to 22855. [2021-08-21 19:01:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22855 states, 22854 states have (on average 2.566377876958082) internal successors, (58652), 22854 states have internal predecessors, (58652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22855 states to 22855 states and 58652 transitions. [2021-08-21 19:01:13,155 INFO L78 Accepts]: Start accepts. Automaton has 22855 states and 58652 transitions. Word has length 35 [2021-08-21 19:01:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:13,156 INFO L470 AbstractCegarLoop]: Abstraction has 22855 states and 58652 transitions. [2021-08-21 19:01:13,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 22855 states and 58652 transitions. [2021-08-21 19:01:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:13,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:13,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:13,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-08-21 19:01:13,190 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1902745796, now seen corresponding path program 2 times [2021-08-21 19:01:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:13,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575688797] [2021-08-21 19:01:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:13,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:13,245 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 19:01:13,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:13,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575688797] [2021-08-21 19:01:13,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575688797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:13,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152464305] [2021-08-21 19:01:13,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:13,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:13,246 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 19:01:13,247 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 19:01:17,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:17,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:17,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:17,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:17,324 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 19:01:17,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152464305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:17,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:17,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:17,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949513460] [2021-08-21 19:01:17,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:17,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:17,325 INFO L87 Difference]: Start difference. First operand 22855 states and 58652 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:17,463 INFO L93 Difference]: Finished difference Result 24982 states and 62921 transitions. [2021-08-21 19:01:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:17,514 INFO L225 Difference]: With dead ends: 24982 [2021-08-21 19:01:17,514 INFO L226 Difference]: Without dead ends: 24973 [2021-08-21 19:01:17,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24973 states. [2021-08-21 19:01:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24973 to 22922. [2021-08-21 19:01:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22922 states, 22921 states have (on average 2.565071331966319) internal successors, (58794), 22921 states have internal predecessors, (58794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22922 states to 22922 states and 58794 transitions. [2021-08-21 19:01:17,875 INFO L78 Accepts]: Start accepts. Automaton has 22922 states and 58794 transitions. Word has length 35 [2021-08-21 19:01:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 22922 states and 58794 transitions. [2021-08-21 19:01:17,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 22922 states and 58794 transitions. [2021-08-21 19:01:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:17,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:17,910 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, 1, 1, 1] [2021-08-21 19:01:17,938 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 19:01:18,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:18,111 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1909810760, now seen corresponding path program 3 times [2021-08-21 19:01:18,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:18,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189537876] [2021-08-21 19:01:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:18,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:18,167 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 19:01:18,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:18,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189537876] [2021-08-21 19:01:18,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189537876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:18,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390532128] [2021-08-21 19:01:18,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:18,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:18,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:18,168 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 19:01:18,169 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 19:01:22,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:22,204 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 19:01:22,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390532128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:22,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:22,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:22,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711948400] [2021-08-21 19:01:22,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:22,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:22,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:22,205 INFO L87 Difference]: Start difference. First operand 22922 states and 58794 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:22,371 INFO L93 Difference]: Finished difference Result 25402 states and 64156 transitions. [2021-08-21 19:01:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:22,425 INFO L225 Difference]: With dead ends: 25402 [2021-08-21 19:01:22,425 INFO L226 Difference]: Without dead ends: 25393 [2021-08-21 19:01:22,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25393 states. [2021-08-21 19:01:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25393 to 22972. [2021-08-21 19:01:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 2.568325279700492) internal successors, (58997), 22971 states have internal predecessors, (58997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 58997 transitions. [2021-08-21 19:01:22,783 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 58997 transitions. Word has length 35 [2021-08-21 19:01:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:22,783 INFO L470 AbstractCegarLoop]: Abstraction has 22972 states and 58997 transitions. [2021-08-21 19:01:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 58997 transitions. [2021-08-21 19:01:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:22,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:22,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:22,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-21 19:01:23,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:23,023 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1996065456, now seen corresponding path program 3 times [2021-08-21 19:01:23,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:23,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538324669] [2021-08-21 19:01:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:23,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:23,079 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 19:01:23,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:23,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538324669] [2021-08-21 19:01:23,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538324669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:23,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408691909] [2021-08-21 19:01:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:23,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:23,081 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 19:01:23,081 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 19:01:27,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:27,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:27,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:27,229 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 19:01:27,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408691909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:27,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:27,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:27,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157083749] [2021-08-21 19:01:27,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:27,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:27,230 INFO L87 Difference]: Start difference. First operand 22972 states and 58997 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:27,381 INFO L93 Difference]: Finished difference Result 25316 states and 63979 transitions. [2021-08-21 19:01:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:27,438 INFO L225 Difference]: With dead ends: 25316 [2021-08-21 19:01:27,439 INFO L226 Difference]: Without dead ends: 25307 [2021-08-21 19:01:27,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25307 states. [2021-08-21 19:01:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25307 to 23004. [2021-08-21 19:01:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23004 states, 23003 states have (on average 2.5704908055471027) internal successors, (59129), 23003 states have internal predecessors, (59129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 59129 transitions. [2021-08-21 19:01:27,805 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 59129 transitions. Word has length 35 [2021-08-21 19:01:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:27,805 INFO L470 AbstractCegarLoop]: Abstraction has 23004 states and 59129 transitions. [2021-08-21 19:01:27,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 59129 transitions. [2021-08-21 19:01:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:27,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:27,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:27,867 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 19:01:28,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:28,040 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 345963732, now seen corresponding path program 3 times [2021-08-21 19:01:28,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:28,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586052555] [2021-08-21 19:01:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:28,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:28,098 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 19:01:28,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:28,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586052555] [2021-08-21 19:01:28,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586052555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:28,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165085141] [2021-08-21 19:01:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:28,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:28,099 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 19:01:28,099 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 19:01:31,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:31,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:31,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:32,140 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 19:01:32,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165085141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:32,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:32,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:32,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801320639] [2021-08-21 19:01:32,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:32,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:32,141 INFO L87 Difference]: Start difference. First operand 23004 states and 59129 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:32,307 INFO L93 Difference]: Finished difference Result 25431 states and 64241 transitions. [2021-08-21 19:01:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:32,370 INFO L225 Difference]: With dead ends: 25431 [2021-08-21 19:01:32,370 INFO L226 Difference]: Without dead ends: 25422 [2021-08-21 19:01:32,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25422 states. [2021-08-21 19:01:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25422 to 23045. [2021-08-21 19:01:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23045 states, 23044 states have (on average 2.572513452525603) internal successors, (59281), 23044 states have internal predecessors, (59281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23045 states to 23045 states and 59281 transitions. [2021-08-21 19:01:32,724 INFO L78 Accepts]: Start accepts. Automaton has 23045 states and 59281 transitions. Word has length 35 [2021-08-21 19:01:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:32,724 INFO L470 AbstractCegarLoop]: Abstraction has 23045 states and 59281 transitions. [2021-08-21 19:01:32,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 23045 states and 59281 transitions. [2021-08-21 19:01:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:32,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:32,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:32,794 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 19:01:32,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:32,965 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1727900476, now seen corresponding path program 1 times [2021-08-21 19:01:32,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:32,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158997381] [2021-08-21 19:01:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:32,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:33,020 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 19:01:33,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:33,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158997381] [2021-08-21 19:01:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158997381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:33,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:01:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073792750] [2021-08-21 19:01:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:33,021 INFO L87 Difference]: Start difference. First operand 23045 states and 59281 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:33,166 INFO L93 Difference]: Finished difference Result 25816 states and 64995 transitions. [2021-08-21 19:01:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:33,220 INFO L225 Difference]: With dead ends: 25816 [2021-08-21 19:01:33,220 INFO L226 Difference]: Without dead ends: 25803 [2021-08-21 19:01:33,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25803 states. [2021-08-21 19:01:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25803 to 23122. [2021-08-21 19:01:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23122 states, 23121 states have (on average 2.5719908308464166) internal successors, (59467), 23121 states have internal predecessors, (59467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23122 states to 23122 states and 59467 transitions. [2021-08-21 19:01:33,673 INFO L78 Accepts]: Start accepts. Automaton has 23122 states and 59467 transitions. Word has length 35 [2021-08-21 19:01:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:33,673 INFO L470 AbstractCegarLoop]: Abstraction has 23122 states and 59467 transitions. [2021-08-21 19:01:33,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23122 states and 59467 transitions. [2021-08-21 19:01:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:33,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:33,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:33,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-08-21 19:01:33,710 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash 4394820, now seen corresponding path program 2 times [2021-08-21 19:01:33,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:33,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413296327] [2021-08-21 19:01:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:33,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:33,765 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 19:01:33,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413296327] [2021-08-21 19:01:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413296327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284207595] [2021-08-21 19:01:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:33,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:33,766 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 19:01:33,767 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 19:01:37,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:37,900 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 19:01:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284207595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:37,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:37,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:37,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644498935] [2021-08-21 19:01:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:37,901 INFO L87 Difference]: Start difference. First operand 23122 states and 59467 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:38,071 INFO L93 Difference]: Finished difference Result 25627 states and 64869 transitions. [2021-08-21 19:01:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:38,123 INFO L225 Difference]: With dead ends: 25627 [2021-08-21 19:01:38,123 INFO L226 Difference]: Without dead ends: 25618 [2021-08-21 19:01:38,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25618 states. [2021-08-21 19:01:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25618 to 23181. [2021-08-21 19:01:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23181 states, 23180 states have (on average 2.5751941328731665) internal successors, (59693), 23180 states have internal predecessors, (59693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23181 states to 23181 states and 59693 transitions. [2021-08-21 19:01:38,477 INFO L78 Accepts]: Start accepts. Automaton has 23181 states and 59693 transitions. Word has length 35 [2021-08-21 19:01:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:38,477 INFO L470 AbstractCegarLoop]: Abstraction has 23181 states and 59693 transitions. [2021-08-21 19:01:38,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23181 states and 59693 transitions. [2021-08-21 19:01:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:38,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:38,514 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 19:01:38,545 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 19:01:38,717 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,SelfDestructingSolverStorable255 [2021-08-21 19:01:38,717 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -612792512, now seen corresponding path program 3 times [2021-08-21 19:01:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:38,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792576030] [2021-08-21 19:01:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:38,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:38,774 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 19:01:38,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:38,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792576030] [2021-08-21 19:01:38,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792576030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:38,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998427175] [2021-08-21 19:01:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:38,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:38,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:38,775 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 19:01:38,776 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 19:01:42,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:42,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:42,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:42,984 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 19:01:42,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998427175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:42,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:42,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:42,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613023063] [2021-08-21 19:01:42,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:42,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:42,985 INFO L87 Difference]: Start difference. First operand 23181 states and 59693 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:43,163 INFO L93 Difference]: Finished difference Result 25738 states and 65155 transitions. [2021-08-21 19:01:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:43,220 INFO L225 Difference]: With dead ends: 25738 [2021-08-21 19:01:43,220 INFO L226 Difference]: Without dead ends: 25729 [2021-08-21 19:01:43,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25729 states. [2021-08-21 19:01:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25729 to 23249. [2021-08-21 19:01:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23249 states, 23248 states have (on average 2.5774690295939435) internal successors, (59921), 23248 states have internal predecessors, (59921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23249 states to 23249 states and 59921 transitions. [2021-08-21 19:01:43,586 INFO L78 Accepts]: Start accepts. Automaton has 23249 states and 59921 transitions. Word has length 35 [2021-08-21 19:01:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:43,586 INFO L470 AbstractCegarLoop]: Abstraction has 23249 states and 59921 transitions. [2021-08-21 19:01:43,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 23249 states and 59921 transitions. [2021-08-21 19:01:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:43,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:43,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:43,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-21 19:01:43,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:43,826 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1229979844, now seen corresponding path program 2 times [2021-08-21 19:01:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:43,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305382838] [2021-08-21 19:01:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:43,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:43,882 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 19:01:43,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:43,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305382838] [2021-08-21 19:01:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305382838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:43,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838607676] [2021-08-21 19:01:43,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:43,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:43,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:43,883 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 19:01:43,884 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 19:01:47,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:47,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:47,978 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 19:01:47,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838607676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:47,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:47,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:47,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551409713] [2021-08-21 19:01:47,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:47,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:47,979 INFO L87 Difference]: Start difference. First operand 23249 states and 59921 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:48,133 INFO L93 Difference]: Finished difference Result 25618 states and 64944 transitions. [2021-08-21 19:01:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:48,200 INFO L225 Difference]: With dead ends: 25618 [2021-08-21 19:01:48,200 INFO L226 Difference]: Without dead ends: 25609 [2021-08-21 19:01:48,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25609 states. [2021-08-21 19:01:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25609 to 23290. [2021-08-21 19:01:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23290 states, 23289 states have (on average 2.5795869294516725) internal successors, (60076), 23289 states have internal predecessors, (60076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23290 states to 23290 states and 60076 transitions. [2021-08-21 19:01:48,569 INFO L78 Accepts]: Start accepts. Automaton has 23290 states and 60076 transitions. Word has length 35 [2021-08-21 19:01:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:48,569 INFO L470 AbstractCegarLoop]: Abstraction has 23290 states and 60076 transitions. [2021-08-21 19:01:48,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 23290 states and 60076 transitions. [2021-08-21 19:01:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:48,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:48,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:48,637 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 19:01:48,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 19:01:48,809 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1847167176, now seen corresponding path program 2 times [2021-08-21 19:01:48,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:48,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184927602] [2021-08-21 19:01:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:48,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:48,865 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 19:01:48,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184927602] [2021-08-21 19:01:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184927602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448114384] [2021-08-21 19:01:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:48,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:48,867 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 19:01:48,867 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 19:01:53,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:53,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:53,195 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 19:01:53,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448114384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:53,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:53,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:53,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420125965] [2021-08-21 19:01:53,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:53,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:53,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:53,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:53,196 INFO L87 Difference]: Start difference. First operand 23290 states and 60076 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:53,379 INFO L93 Difference]: Finished difference Result 25745 states and 65228 transitions. [2021-08-21 19:01:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:53,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:53,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:53,431 INFO L225 Difference]: With dead ends: 25745 [2021-08-21 19:01:53,431 INFO L226 Difference]: Without dead ends: 25736 [2021-08-21 19:01:53,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25736 states. [2021-08-21 19:01:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25736 to 23336. [2021-08-21 19:01:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23336 states, 23335 states have (on average 2.580887079494322) internal successors, (60225), 23335 states have internal predecessors, (60225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23336 states to 23336 states and 60225 transitions. [2021-08-21 19:01:53,781 INFO L78 Accepts]: Start accepts. Automaton has 23336 states and 60225 transitions. Word has length 35 [2021-08-21 19:01:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:53,781 INFO L470 AbstractCegarLoop]: Abstraction has 23336 states and 60225 transitions. [2021-08-21 19:01:53,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 23336 states and 60225 transitions. [2021-08-21 19:01:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:53,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:53,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:53,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-21 19:01:54,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:54,017 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1915801792, now seen corresponding path program 4 times [2021-08-21 19:01:54,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:54,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086567087] [2021-08-21 19:01:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:54,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:54,073 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 19:01:54,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:54,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086567087] [2021-08-21 19:01:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086567087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:54,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086804469] [2021-08-21 19:01:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:54,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:54,074 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 19:01:54,075 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 19:01:58,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:01:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:58,303 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 19:01:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086804469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:58,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:58,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:01:58,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898195197] [2021-08-21 19:01:58,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:01:58,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:01:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:01:58,304 INFO L87 Difference]: Start difference. First operand 23336 states and 60225 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:58,479 INFO L93 Difference]: Finished difference Result 25826 states and 65645 transitions. [2021-08-21 19:01:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:01:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:58,536 INFO L225 Difference]: With dead ends: 25826 [2021-08-21 19:01:58,536 INFO L226 Difference]: Without dead ends: 25817 [2021-08-21 19:01:58,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:01:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25817 states. [2021-08-21 19:01:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25817 to 23388. [2021-08-21 19:01:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 2.5845982810963357) internal successors, (60446), 23387 states have internal predecessors, (60446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 60446 transitions. [2021-08-21 19:01:58,903 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 60446 transitions. Word has length 35 [2021-08-21 19:01:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:58,903 INFO L470 AbstractCegarLoop]: Abstraction has 23388 states and 60446 transitions. [2021-08-21 19:01:58,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:01:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 60446 transitions. [2021-08-21 19:01:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:01:58,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:58,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:58,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 19:01:59,141 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,SelfDestructingSolverStorable259 [2021-08-21 19:01:59,141 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:01:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1549413696, now seen corresponding path program 4 times [2021-08-21 19:01:59,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:59,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670697205] [2021-08-21 19:01:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:59,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:59,200 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 19:01:59,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:59,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670697205] [2021-08-21 19:01:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670697205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:59,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164756224] [2021-08-21 19:01:59,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:59,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:59,201 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 19:01:59,202 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 19:02:03,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:03,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:03,488 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 19:02:03,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164756224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:03,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:03,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:03,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511955128] [2021-08-21 19:02:03,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:03,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:03,489 INFO L87 Difference]: Start difference. First operand 23388 states and 60446 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:03,650 INFO L93 Difference]: Finished difference Result 25692 states and 65288 transitions. [2021-08-21 19:02:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:03,707 INFO L225 Difference]: With dead ends: 25692 [2021-08-21 19:02:03,707 INFO L226 Difference]: Without dead ends: 25683 [2021-08-21 19:02:03,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:02:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25683 states. [2021-08-21 19:02:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25683 to 23416. [2021-08-21 19:02:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23416 states, 23415 states have (on average 2.5860345932094813) internal successors, (60552), 23415 states have internal predecessors, (60552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23416 states to 23416 states and 60552 transitions. [2021-08-21 19:02:04,081 INFO L78 Accepts]: Start accepts. Automaton has 23416 states and 60552 transitions. Word has length 35 [2021-08-21 19:02:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:04,081 INFO L470 AbstractCegarLoop]: Abstraction has 23416 states and 60552 transitions. [2021-08-21 19:02:04,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23416 states and 60552 transitions. [2021-08-21 19:02:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:04,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:04,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:04,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 19:02:04,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:04,325 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash 95508756, now seen corresponding path program 4 times [2021-08-21 19:02:04,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:04,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753417703] [2021-08-21 19:02:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:04,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:04,385 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 19:02:04,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:04,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753417703] [2021-08-21 19:02:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753417703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:04,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205541344] [2021-08-21 19:02:04,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:04,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:04,386 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 19:02:04,387 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 19:02:08,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:08,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:08,650 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 19:02:08,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205541344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:08,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:08,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:08,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653855830] [2021-08-21 19:02:08,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:08,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:08,651 INFO L87 Difference]: Start difference. First operand 23416 states and 60552 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:08,811 INFO L93 Difference]: Finished difference Result 25865 states and 65512 transitions. [2021-08-21 19:02:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:08,873 INFO L225 Difference]: With dead ends: 25865 [2021-08-21 19:02:08,873 INFO L226 Difference]: Without dead ends: 25852 [2021-08-21 19:02:08,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-08-21 19:02:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 23450. [2021-08-21 19:02:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 2.586848053221886) internal successors, (60659), 23449 states have internal predecessors, (60659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 60659 transitions. [2021-08-21 19:02:09,252 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 60659 transitions. Word has length 35 [2021-08-21 19:02:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:09,252 INFO L470 AbstractCegarLoop]: Abstraction has 23450 states and 60659 transitions. [2021-08-21 19:02:09,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 60659 transitions. [2021-08-21 19:02:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:09,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:09,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:09,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-21 19:02:09,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,493 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1552656404, now seen corresponding path program 4 times [2021-08-21 19:02:09,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:09,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385705314] [2021-08-21 19:02:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:09,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:09,556 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 19:02:09,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:09,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385705314] [2021-08-21 19:02:09,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385705314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:09,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988197845] [2021-08-21 19:02:09,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:09,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:09,557 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 19:02:09,557 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 19:02:13,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:13,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:14,000 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 19:02:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988197845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:14,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:14,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:14,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780080470] [2021-08-21 19:02:14,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:14,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:14,000 INFO L87 Difference]: Start difference. First operand 23450 states and 60659 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:14,158 INFO L93 Difference]: Finished difference Result 26023 states and 66250 transitions. [2021-08-21 19:02:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:14,217 INFO L225 Difference]: With dead ends: 26023 [2021-08-21 19:02:14,217 INFO L226 Difference]: Without dead ends: 26014 [2021-08-21 19:02:14,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26014 states. [2021-08-21 19:02:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26014 to 23503. [2021-08-21 19:02:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23503 states, 23502 states have (on average 2.5904178367798485) internal successors, (60880), 23502 states have internal predecessors, (60880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23503 states to 23503 states and 60880 transitions. [2021-08-21 19:02:14,581 INFO L78 Accepts]: Start accepts. Automaton has 23503 states and 60880 transitions. Word has length 35 [2021-08-21 19:02:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:14,581 INFO L470 AbstractCegarLoop]: Abstraction has 23503 states and 60880 transitions. [2021-08-21 19:02:14,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23503 states and 60880 transitions. [2021-08-21 19:02:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:14,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:14,618 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, 1, 1, 1] [2021-08-21 19:02:14,646 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 19:02:14,818 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,SelfDestructingSolverStorable262 [2021-08-21 19:02:14,818 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash 939697088, now seen corresponding path program 5 times [2021-08-21 19:02:14,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:14,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099457348] [2021-08-21 19:02:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:14,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:14,883 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 19:02:14,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:14,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099457348] [2021-08-21 19:02:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099457348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:14,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617775142] [2021-08-21 19:02:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:14,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:14,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:14,885 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 19:02:14,885 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 19:02:19,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:19,287 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 19:02:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617775142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:19,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:19,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:19,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895013437] [2021-08-21 19:02:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:19,288 INFO L87 Difference]: Start difference. First operand 23503 states and 60880 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:19,460 INFO L93 Difference]: Finished difference Result 25716 states and 65702 transitions. [2021-08-21 19:02:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:19,517 INFO L225 Difference]: With dead ends: 25716 [2021-08-21 19:02:19,517 INFO L226 Difference]: Without dead ends: 25707 [2021-08-21 19:02:19,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:02:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25707 states. [2021-08-21 19:02:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25707 to 23557. [2021-08-21 19:02:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23557 states, 23556 states have (on average 2.5931822041093566) internal successors, (61085), 23556 states have internal predecessors, (61085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23557 states to 23557 states and 61085 transitions. [2021-08-21 19:02:20,046 INFO L78 Accepts]: Start accepts. Automaton has 23557 states and 61085 transitions. Word has length 35 [2021-08-21 19:02:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:20,046 INFO L470 AbstractCegarLoop]: Abstraction has 23557 states and 61085 transitions. [2021-08-21 19:02:20,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 23557 states and 61085 transitions. [2021-08-21 19:02:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:20,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:20,087 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, 1, 1, 1] [2021-08-21 19:02:20,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-21 19:02:20,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:20,289 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1173132732, now seen corresponding path program 6 times [2021-08-21 19:02:20,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:20,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215143290] [2021-08-21 19:02:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:20,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:20,310 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 19:02:20,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:20,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215143290] [2021-08-21 19:02:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215143290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:20,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098924570] [2021-08-21 19:02:20,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:20,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:20,352 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 19:02:20,352 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 19:02:24,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:02:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:24,740 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 19:02:24,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098924570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:24,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:24,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:24,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665360365] [2021-08-21 19:02:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:24,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:24,741 INFO L87 Difference]: Start difference. First operand 23557 states and 61085 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:24,905 INFO L93 Difference]: Finished difference Result 25620 states and 65528 transitions. [2021-08-21 19:02:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:24,956 INFO L225 Difference]: With dead ends: 25620 [2021-08-21 19:02:24,956 INFO L226 Difference]: Without dead ends: 25611 [2021-08-21 19:02:24,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25611 states. [2021-08-21 19:02:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25611 to 23599. [2021-08-21 19:02:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23599 states, 23598 states have (on average 2.596152216289516) internal successors, (61264), 23598 states have internal predecessors, (61264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23599 states to 23599 states and 61264 transitions. [2021-08-21 19:02:25,320 INFO L78 Accepts]: Start accepts. Automaton has 23599 states and 61264 transitions. Word has length 35 [2021-08-21 19:02:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:25,320 INFO L470 AbstractCegarLoop]: Abstraction has 23599 states and 61264 transitions. [2021-08-21 19:02:25,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 23599 states and 61264 transitions. [2021-08-21 19:02:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:25,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:25,356 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 19:02:25,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-21 19:02:25,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:25,557 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash 710824388, now seen corresponding path program 3 times [2021-08-21 19:02:25,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:25,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692214821] [2021-08-21 19:02:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:25,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:25,614 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 19:02:25,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:25,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692214821] [2021-08-21 19:02:25,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692214821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:25,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663246842] [2021-08-21 19:02:25,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:25,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:25,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:25,615 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 19:02:25,616 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 19:02:29,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:29,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:29,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:30,008 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 19:02:30,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663246842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:30,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:30,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:30,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651891199] [2021-08-21 19:02:30,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:30,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:30,009 INFO L87 Difference]: Start difference. First operand 23599 states and 61264 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:30,173 INFO L93 Difference]: Finished difference Result 25907 states and 66345 transitions. [2021-08-21 19:02:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:30,236 INFO L225 Difference]: With dead ends: 25907 [2021-08-21 19:02:30,236 INFO L226 Difference]: Without dead ends: 25898 [2021-08-21 19:02:30,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:02:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25898 states. [2021-08-21 19:02:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25898 to 23630. [2021-08-21 19:02:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23630 states, 23629 states have (on average 2.5989250497270304) internal successors, (61410), 23629 states have internal predecessors, (61410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23630 states to 23630 states and 61410 transitions. [2021-08-21 19:02:30,620 INFO L78 Accepts]: Start accepts. Automaton has 23630 states and 61410 transitions. Word has length 35 [2021-08-21 19:02:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:30,621 INFO L470 AbstractCegarLoop]: Abstraction has 23630 states and 61410 transitions. [2021-08-21 19:02:30,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23630 states and 61410 transitions. [2021-08-21 19:02:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:30,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:30,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:30,686 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 19:02:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:30,858 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 965197516, now seen corresponding path program 3 times [2021-08-21 19:02:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:30,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786016735] [2021-08-21 19:02:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:30,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:30,918 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 19:02:30,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:30,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786016735] [2021-08-21 19:02:30,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786016735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:30,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929796669] [2021-08-21 19:02:30,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:30,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:30,919 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 19:02:30,920 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 19:02:35,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:35,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:35,480 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 19:02:35,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929796669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:35,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:35,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:35,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879531574] [2021-08-21 19:02:35,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:35,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:35,481 INFO L87 Difference]: Start difference. First operand 23630 states and 61410 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:35,663 INFO L93 Difference]: Finished difference Result 25805 states and 66123 transitions. [2021-08-21 19:02:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:35,721 INFO L225 Difference]: With dead ends: 25805 [2021-08-21 19:02:35,721 INFO L226 Difference]: Without dead ends: 25796 [2021-08-21 19:02:35,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:02:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25796 states. [2021-08-21 19:02:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25796 to 23639. [2021-08-21 19:02:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23639 states, 23638 states have (on average 2.599839241898638) internal successors, (61455), 23638 states have internal predecessors, (61455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23639 states to 23639 states and 61455 transitions. [2021-08-21 19:02:36,084 INFO L78 Accepts]: Start accepts. Automaton has 23639 states and 61455 transitions. Word has length 35 [2021-08-21 19:02:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:36,085 INFO L470 AbstractCegarLoop]: Abstraction has 23639 states and 61455 transitions. [2021-08-21 19:02:36,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 23639 states and 61455 transitions. [2021-08-21 19:02:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:36,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:36,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:36,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-21 19:02:36,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-21 19:02:36,322 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1092384080, now seen corresponding path program 3 times [2021-08-21 19:02:36,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:36,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864312276] [2021-08-21 19:02:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:36,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:36,481 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 19:02:36,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864312276] [2021-08-21 19:02:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864312276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813290122] [2021-08-21 19:02:36,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:36,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:36,483 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 19:02:36,484 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 19:02:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:40,816 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 19:02:40,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813290122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:40,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:40,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:40,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611911080] [2021-08-21 19:02:40,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:40,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:40,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:40,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:40,817 INFO L87 Difference]: Start difference. First operand 23639 states and 61455 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:40,997 INFO L93 Difference]: Finished difference Result 25893 states and 66326 transitions. [2021-08-21 19:02:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:41,053 INFO L225 Difference]: With dead ends: 25893 [2021-08-21 19:02:41,053 INFO L226 Difference]: Without dead ends: 25884 [2021-08-21 19:02:41,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:02:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2021-08-21 19:02:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 23656. [2021-08-21 19:02:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23656 states, 23655 states have (on average 2.6009723102938067) internal successors, (61526), 23655 states have internal predecessors, (61526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23656 states to 23656 states and 61526 transitions. [2021-08-21 19:02:41,439 INFO L78 Accepts]: Start accepts. Automaton has 23656 states and 61526 transitions. Word has length 35 [2021-08-21 19:02:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:41,439 INFO L470 AbstractCegarLoop]: Abstraction has 23656 states and 61526 transitions. [2021-08-21 19:02:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 23656 states and 61526 transitions. [2021-08-21 19:02:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:41,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:41,477 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, 1, 1, 1] [2021-08-21 19:02:41,506 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 19:02:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 19:02:41,678 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1622752072, now seen corresponding path program 3 times [2021-08-21 19:02:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:41,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479889430] [2021-08-21 19:02:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:41,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:41,746 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 19:02:41,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:41,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479889430] [2021-08-21 19:02:41,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479889430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:41,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977467216] [2021-08-21 19:02:41,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:41,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:41,748 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 19:02:41,749 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 19:02:46,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:02:46,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:46,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:46,199 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 19:02:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977467216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:46,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:46,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:46,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952124135] [2021-08-21 19:02:46,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:46,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:46,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:46,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:46,200 INFO L87 Difference]: Start difference. First operand 23656 states and 61526 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:46,352 INFO L93 Difference]: Finished difference Result 25985 states and 66414 transitions. [2021-08-21 19:02:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:46,407 INFO L225 Difference]: With dead ends: 25985 [2021-08-21 19:02:46,407 INFO L226 Difference]: Without dead ends: 25976 [2021-08-21 19:02:46,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:02:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25976 states. [2021-08-21 19:02:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25976 to 23719. [2021-08-21 19:02:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23719 states, 23718 states have (on average 2.602580318745257) internal successors, (61728), 23718 states have internal predecessors, (61728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23719 states to 23719 states and 61728 transitions. [2021-08-21 19:02:46,902 INFO L78 Accepts]: Start accepts. Automaton has 23719 states and 61728 transitions. Word has length 35 [2021-08-21 19:02:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 23719 states and 61728 transitions. [2021-08-21 19:02:46,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 23719 states and 61728 transitions. [2021-08-21 19:02:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:46,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:46,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:46,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-21 19:02:47,141 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,SelfDestructingSolverStorable268 [2021-08-21 19:02:47,141 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:47,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2034291276, now seen corresponding path program 3 times [2021-08-21 19:02:47,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:47,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425568262] [2021-08-21 19:02:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:47,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:47,201 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 19:02:47,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:47,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425568262] [2021-08-21 19:02:47,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425568262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:47,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745382301] [2021-08-21 19:02:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:47,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:47,202 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 19:02:47,203 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 19:02:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:02:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:51,565 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 19:02:51,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745382301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:51,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:51,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:51,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421866980] [2021-08-21 19:02:51,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:51,566 INFO L87 Difference]: Start difference. First operand 23719 states and 61728 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:51,715 INFO L93 Difference]: Finished difference Result 26137 states and 66722 transitions. [2021-08-21 19:02:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:51,777 INFO L225 Difference]: With dead ends: 26137 [2021-08-21 19:02:51,777 INFO L226 Difference]: Without dead ends: 26128 [2021-08-21 19:02:51,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:02:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26128 states. [2021-08-21 19:02:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26128 to 23787. [2021-08-21 19:02:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23787 states, 23786 states have (on average 2.602959724207517) internal successors, (61914), 23786 states have internal predecessors, (61914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23787 states to 23787 states and 61914 transitions. [2021-08-21 19:02:52,325 INFO L78 Accepts]: Start accepts. Automaton has 23787 states and 61914 transitions. Word has length 35 [2021-08-21 19:02:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:52,326 INFO L470 AbstractCegarLoop]: Abstraction has 23787 states and 61914 transitions. [2021-08-21 19:02:52,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 23787 states and 61914 transitions. [2021-08-21 19:02:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:52,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:52,363 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 19:02:52,392 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 19:02:52,564 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,SelfDestructingSolverStorable269 [2021-08-21 19:02:52,565 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1815277392, now seen corresponding path program 3 times [2021-08-21 19:02:52,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:52,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572112541] [2021-08-21 19:02:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:52,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:52,626 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 19:02:52,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572112541] [2021-08-21 19:02:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572112541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811201473] [2021-08-21 19:02:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:52,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:52,627 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 19:02:52,627 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 19:02:56,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:56,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:02:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:57,132 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 19:02:57,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811201473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:57,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:57,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:02:57,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863823753] [2021-08-21 19:02:57,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:02:57,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:02:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:02:57,133 INFO L87 Difference]: Start difference. First operand 23787 states and 61914 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:57,288 INFO L93 Difference]: Finished difference Result 26199 states and 67213 transitions. [2021-08-21 19:02:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:02:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:57,343 INFO L225 Difference]: With dead ends: 26199 [2021-08-21 19:02:57,343 INFO L226 Difference]: Without dead ends: 26190 [2021-08-21 19:02:57,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:02:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26190 states. [2021-08-21 19:02:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26190 to 23823. [2021-08-21 19:02:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23823 states, 23822 states have (on average 2.6057425908823775) internal successors, (62074), 23822 states have internal predecessors, (62074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23823 states to 23823 states and 62074 transitions. [2021-08-21 19:02:57,742 INFO L78 Accepts]: Start accepts. Automaton has 23823 states and 62074 transitions. Word has length 35 [2021-08-21 19:02:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 23823 states and 62074 transitions. [2021-08-21 19:02:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:02:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23823 states and 62074 transitions. [2021-08-21 19:02:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:02:57,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:57,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:57,809 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 19:02:57,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:57,980 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:02:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1656611496, now seen corresponding path program 3 times [2021-08-21 19:02:57,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:57,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808198055] [2021-08-21 19:02:57,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:57,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:58,040 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 19:02:58,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:58,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808198055] [2021-08-21 19:02:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808198055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:58,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839397901] [2021-08-21 19:02:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:58,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:58,041 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 19:02:58,042 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 19:03:02,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:02,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:02,622 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 19:03:02,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839397901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:02,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:02,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:02,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519198285] [2021-08-21 19:03:02,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:02,623 INFO L87 Difference]: Start difference. First operand 23823 states and 62074 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:02,774 INFO L93 Difference]: Finished difference Result 26099 states and 66981 transitions. [2021-08-21 19:03:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:02,826 INFO L225 Difference]: With dead ends: 26099 [2021-08-21 19:03:02,826 INFO L226 Difference]: Without dead ends: 26090 [2021-08-21 19:03:02,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26090 states. [2021-08-21 19:03:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26090 to 23841. [2021-08-21 19:03:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23841 states, 23840 states have (on average 2.6073406040268456) internal successors, (62159), 23840 states have internal predecessors, (62159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23841 states to 23841 states and 62159 transitions. [2021-08-21 19:03:03,351 INFO L78 Accepts]: Start accepts. Automaton has 23841 states and 62159 transitions. Word has length 35 [2021-08-21 19:03:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:03,351 INFO L470 AbstractCegarLoop]: Abstraction has 23841 states and 62159 transitions. [2021-08-21 19:03:03,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 23841 states and 62159 transitions. [2021-08-21 19:03:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:03,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:03,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:03,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-21 19:03:03,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,591 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1245072292, now seen corresponding path program 3 times [2021-08-21 19:03:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:03,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119498143] [2021-08-21 19:03:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:03,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:03,671 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 19:03:03,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:03,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119498143] [2021-08-21 19:03:03,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119498143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764415960] [2021-08-21 19:03:03,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:03,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:03,672 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 19:03:03,673 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 19:03:08,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:08,169 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 19:03:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764415960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:08,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:08,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:08,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954672426] [2021-08-21 19:03:08,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:08,170 INFO L87 Difference]: Start difference. First operand 23841 states and 62159 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:08,326 INFO L93 Difference]: Finished difference Result 26199 states and 67218 transitions. [2021-08-21 19:03:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:08,384 INFO L225 Difference]: With dead ends: 26199 [2021-08-21 19:03:08,384 INFO L226 Difference]: Without dead ends: 26190 [2021-08-21 19:03:08,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26190 states. [2021-08-21 19:03:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26190 to 23867. [2021-08-21 19:03:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23867 states, 23866 states have (on average 2.60902539177072) internal successors, (62267), 23866 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23867 states to 23867 states and 62267 transitions. [2021-08-21 19:03:08,768 INFO L78 Accepts]: Start accepts. Automaton has 23867 states and 62267 transitions. Word has length 35 [2021-08-21 19:03:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:08,768 INFO L470 AbstractCegarLoop]: Abstraction has 23867 states and 62267 transitions. [2021-08-21 19:03:08,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 23867 states and 62267 transitions. [2021-08-21 19:03:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:08,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:08,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:08,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:09,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:09,007 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash -596813300, now seen corresponding path program 1 times [2021-08-21 19:03:09,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:09,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343226605] [2021-08-21 19:03:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:09,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:09,068 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 19:03:09,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:09,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343226605] [2021-08-21 19:03:09,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343226605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:09,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:09,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:09,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861099757] [2021-08-21 19:03:09,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:09,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:09,069 INFO L87 Difference]: Start difference. First operand 23867 states and 62267 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:09,218 INFO L93 Difference]: Finished difference Result 26424 states and 67441 transitions. [2021-08-21 19:03:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:09,276 INFO L225 Difference]: With dead ends: 26424 [2021-08-21 19:03:09,276 INFO L226 Difference]: Without dead ends: 26411 [2021-08-21 19:03:09,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26411 states. [2021-08-21 19:03:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26411 to 24008. [2021-08-21 19:03:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24008 states, 24007 states have (on average 2.6080309909609696) internal successors, (62611), 24007 states have internal predecessors, (62611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24008 states to 24008 states and 62611 transitions. [2021-08-21 19:03:09,647 INFO L78 Accepts]: Start accepts. Automaton has 24008 states and 62611 transitions. Word has length 35 [2021-08-21 19:03:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:09,647 INFO L470 AbstractCegarLoop]: Abstraction has 24008 states and 62611 transitions. [2021-08-21 19:03:09,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24008 states and 62611 transitions. [2021-08-21 19:03:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:09,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:09,686 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 19:03:09,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-08-21 19:03:09,686 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash 860334348, now seen corresponding path program 1 times [2021-08-21 19:03:09,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:09,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752571940] [2021-08-21 19:03:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:09,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:09,761 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 19:03:09,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:09,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752571940] [2021-08-21 19:03:09,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752571940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:09,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:09,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:09,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142523598] [2021-08-21 19:03:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:09,762 INFO L87 Difference]: Start difference. First operand 24008 states and 62611 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:09,924 INFO L93 Difference]: Finished difference Result 26629 states and 68205 transitions. [2021-08-21 19:03:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:09,983 INFO L225 Difference]: With dead ends: 26629 [2021-08-21 19:03:09,983 INFO L226 Difference]: Without dead ends: 26620 [2021-08-21 19:03:09,983 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 19:03:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26620 states. [2021-08-21 19:03:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26620 to 24093. [2021-08-21 19:03:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24093 states, 24092 states have (on average 2.6113232608334718) internal successors, (62912), 24092 states have internal predecessors, (62912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24093 states to 24093 states and 62912 transitions. [2021-08-21 19:03:10,526 INFO L78 Accepts]: Start accepts. Automaton has 24093 states and 62912 transitions. Word has length 35 [2021-08-21 19:03:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:10,526 INFO L470 AbstractCegarLoop]: Abstraction has 24093 states and 62912 transitions. [2021-08-21 19:03:10,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24093 states and 62912 transitions. [2021-08-21 19:03:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:10,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:10,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:10,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-08-21 19:03:10,565 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1992874040, now seen corresponding path program 2 times [2021-08-21 19:03:10,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:10,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203264653] [2021-08-21 19:03:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:10,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:10,629 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 19:03:10,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:10,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203264653] [2021-08-21 19:03:10,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203264653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:10,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814684914] [2021-08-21 19:03:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:10,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:10,633 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 19:03:10,672 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 19:03:15,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:15,334 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 19:03:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814684914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:15,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:15,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:15,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979527606] [2021-08-21 19:03:15,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:15,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:15,335 INFO L87 Difference]: Start difference. First operand 24093 states and 62912 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:15,483 INFO L93 Difference]: Finished difference Result 26257 states and 67278 transitions. [2021-08-21 19:03:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:15,543 INFO L225 Difference]: With dead ends: 26257 [2021-08-21 19:03:15,543 INFO L226 Difference]: Without dead ends: 26248 [2021-08-21 19:03:15,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:03:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26248 states. [2021-08-21 19:03:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26248 to 24154. [2021-08-21 19:03:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24154 states, 24153 states have (on average 2.610772988862667) internal successors, (63058), 24153 states have internal predecessors, (63058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24154 states to 24154 states and 63058 transitions. [2021-08-21 19:03:16,043 INFO L78 Accepts]: Start accepts. Automaton has 24154 states and 63058 transitions. Word has length 35 [2021-08-21 19:03:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 24154 states and 63058 transitions. [2021-08-21 19:03:16,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24154 states and 63058 transitions. [2021-08-21 19:03:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:16,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:16,080 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 19:03:16,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-21 19:03:16,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:16,281 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1999939004, now seen corresponding path program 3 times [2021-08-21 19:03:16,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:16,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457976092] [2021-08-21 19:03:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:16,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:16,346 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 19:03:16,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:16,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457976092] [2021-08-21 19:03:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457976092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:16,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470989924] [2021-08-21 19:03:16,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:16,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:16,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:16,349 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 19:03:16,349 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 19:03:20,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:20,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:20,909 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 19:03:20,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470989924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:20,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:20,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642416972] [2021-08-21 19:03:20,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:20,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:20,910 INFO L87 Difference]: Start difference. First operand 24154 states and 63058 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:21,083 INFO L93 Difference]: Finished difference Result 26628 states and 68451 transitions. [2021-08-21 19:03:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:21,142 INFO L225 Difference]: With dead ends: 26628 [2021-08-21 19:03:21,142 INFO L226 Difference]: Without dead ends: 26619 [2021-08-21 19:03:21,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26619 states. [2021-08-21 19:03:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26619 to 24204. [2021-08-21 19:03:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 2.614551915051853) internal successors, (63280), 24203 states have internal predecessors, (63280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 63280 transitions. [2021-08-21 19:03:21,528 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 63280 transitions. Word has length 35 [2021-08-21 19:03:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:21,528 INFO L470 AbstractCegarLoop]: Abstraction has 24204 states and 63280 transitions. [2021-08-21 19:03:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 63280 transitions. [2021-08-21 19:03:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:21,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:21,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:21,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-21 19:03:21,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:21,766 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1905937212, now seen corresponding path program 3 times [2021-08-21 19:03:21,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:21,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100567813] [2021-08-21 19:03:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:21,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:21,841 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 19:03:21,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:21,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100567813] [2021-08-21 19:03:21,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100567813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:21,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787918960] [2021-08-21 19:03:21,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:21,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:21,842 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 19:03:21,842 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 19:03:26,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:26,505 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 19:03:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787918960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:26,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:26,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58687656] [2021-08-21 19:03:26,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:26,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:26,506 INFO L87 Difference]: Start difference. First operand 24204 states and 63280 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:26,664 INFO L93 Difference]: Finished difference Result 26539 states and 68267 transitions. [2021-08-21 19:03:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:26,722 INFO L225 Difference]: With dead ends: 26539 [2021-08-21 19:03:26,722 INFO L226 Difference]: Without dead ends: 26530 [2021-08-21 19:03:26,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2021-08-21 19:03:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 24236. [2021-08-21 19:03:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24236 states, 24235 states have (on average 2.6170002063131834) internal successors, (63423), 24235 states have internal predecessors, (63423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24236 states to 24236 states and 63423 transitions. [2021-08-21 19:03:27,103 INFO L78 Accepts]: Start accepts. Automaton has 24236 states and 63423 transitions. Word has length 35 [2021-08-21 19:03:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 24236 states and 63423 transitions. [2021-08-21 19:03:27,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24236 states and 63423 transitions. [2021-08-21 19:03:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:27,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:27,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:27,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-21 19:03:27,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 19:03:27,343 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash 436091976, now seen corresponding path program 3 times [2021-08-21 19:03:27,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:27,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520826152] [2021-08-21 19:03:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:27,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:27,406 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 19:03:27,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:27,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520826152] [2021-08-21 19:03:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520826152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:27,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909713181] [2021-08-21 19:03:27,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:27,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:27,407 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 19:03:27,407 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 19:03:31,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:31,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:32,054 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 19:03:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909713181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:32,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044532827] [2021-08-21 19:03:32,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:32,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:32,055 INFO L87 Difference]: Start difference. First operand 24236 states and 63423 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:32,232 INFO L93 Difference]: Finished difference Result 26657 states and 68562 transitions. [2021-08-21 19:03:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:32,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:32,290 INFO L225 Difference]: With dead ends: 26657 [2021-08-21 19:03:32,290 INFO L226 Difference]: Without dead ends: 26648 [2021-08-21 19:03:32,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26648 states. [2021-08-21 19:03:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26648 to 24277. [2021-08-21 19:03:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24277 states, 24276 states have (on average 2.6194595485252923) internal successors, (63590), 24276 states have internal predecessors, (63590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24277 states to 24277 states and 63590 transitions. [2021-08-21 19:03:32,665 INFO L78 Accepts]: Start accepts. Automaton has 24277 states and 63590 transitions. Word has length 35 [2021-08-21 19:03:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:32,665 INFO L470 AbstractCegarLoop]: Abstraction has 24277 states and 63590 transitions. [2021-08-21 19:03:32,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24277 states and 63590 transitions. [2021-08-21 19:03:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:32,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:32,703 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, 1, 1, 1] [2021-08-21 19:03:32,732 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 19:03:32,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 19:03:32,903 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1637772232, now seen corresponding path program 1 times [2021-08-21 19:03:32,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:32,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081639892] [2021-08-21 19:03:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:32,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:32,961 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 19:03:32,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:32,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081639892] [2021-08-21 19:03:32,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081639892] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:03:32,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:03:32,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 19:03:32,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200020477] [2021-08-21 19:03:32,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:32,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:32,962 INFO L87 Difference]: Start difference. First operand 24277 states and 63590 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:33,114 INFO L93 Difference]: Finished difference Result 27068 states and 69351 transitions. [2021-08-21 19:03:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:33,169 INFO L225 Difference]: With dead ends: 27068 [2021-08-21 19:03:33,169 INFO L226 Difference]: Without dead ends: 27055 [2021-08-21 19:03:33,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27055 states. [2021-08-21 19:03:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27055 to 24361. [2021-08-21 19:03:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24361 states, 24360 states have (on average 2.619663382594417) internal successors, (63815), 24360 states have internal predecessors, (63815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24361 states to 24361 states and 63815 transitions. [2021-08-21 19:03:33,643 INFO L78 Accepts]: Start accepts. Automaton has 24361 states and 63815 transitions. Word has length 35 [2021-08-21 19:03:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:33,644 INFO L470 AbstractCegarLoop]: Abstraction has 24361 states and 63815 transitions. [2021-08-21 19:03:33,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24361 states and 63815 transitions. [2021-08-21 19:03:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:33,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:33,681 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 19:03:33,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-08-21 19:03:33,681 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash 94523064, now seen corresponding path program 3 times [2021-08-21 19:03:33,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:33,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849205895] [2021-08-21 19:03:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:33,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:33,879 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 19:03:33,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849205895] [2021-08-21 19:03:33,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849205895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164653300] [2021-08-21 19:03:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:33,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:33,880 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 19:03:33,881 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 19:03:38,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:38,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:38,576 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 19:03:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164653300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:38,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:38,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:38,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348257655] [2021-08-21 19:03:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:38,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:38,577 INFO L87 Difference]: Start difference. First operand 24361 states and 63815 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:38,739 INFO L93 Difference]: Finished difference Result 26866 states and 69252 transitions. [2021-08-21 19:03:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:38,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:38,798 INFO L225 Difference]: With dead ends: 26866 [2021-08-21 19:03:38,798 INFO L226 Difference]: Without dead ends: 26857 [2021-08-21 19:03:38,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-08-21 19:03:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 24420. [2021-08-21 19:03:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24420 states, 24419 states have (on average 2.623530857119456) internal successors, (64064), 24419 states have internal predecessors, (64064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24420 states to 24420 states and 64064 transitions. [2021-08-21 19:03:39,184 INFO L78 Accepts]: Start accepts. Automaton has 24420 states and 64064 transitions. Word has length 35 [2021-08-21 19:03:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:39,184 INFO L470 AbstractCegarLoop]: Abstraction has 24420 states and 64064 transitions. [2021-08-21 19:03:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24420 states and 64064 transitions. [2021-08-21 19:03:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:39,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:39,223 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, 1, 1, 1] [2021-08-21 19:03:39,253 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 19:03:39,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:39,424 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash -522664268, now seen corresponding path program 3 times [2021-08-21 19:03:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:39,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879615060] [2021-08-21 19:03:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:39,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:39,484 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 19:03:39,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:39,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879615060] [2021-08-21 19:03:39,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879615060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:39,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025996398] [2021-08-21 19:03:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:39,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:39,486 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 19:03:39,486 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 19:03:44,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:44,247 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 19:03:44,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025996398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:44,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:44,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:44,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533122315] [2021-08-21 19:03:44,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:44,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:44,248 INFO L87 Difference]: Start difference. First operand 24420 states and 64064 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:44,408 INFO L93 Difference]: Finished difference Result 26963 states and 69543 transitions. [2021-08-21 19:03:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:44,466 INFO L225 Difference]: With dead ends: 26963 [2021-08-21 19:03:44,466 INFO L226 Difference]: Without dead ends: 26954 [2021-08-21 19:03:44,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26954 states. [2021-08-21 19:03:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26954 to 24479. [2021-08-21 19:03:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 2.6268077457308605) internal successors, (64299), 24478 states have internal predecessors, (64299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 64299 transitions. [2021-08-21 19:03:44,877 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 64299 transitions. Word has length 35 [2021-08-21 19:03:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:44,877 INFO L470 AbstractCegarLoop]: Abstraction has 24479 states and 64299 transitions. [2021-08-21 19:03:44,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 64299 transitions. [2021-08-21 19:03:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:44,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:44,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:44,952 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 19:03:45,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:45,121 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1139851600, now seen corresponding path program 2 times [2021-08-21 19:03:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:45,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573150863] [2021-08-21 19:03:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:45,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:45,181 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 19:03:45,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:45,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573150863] [2021-08-21 19:03:45,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573150863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:45,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383432503] [2021-08-21 19:03:45,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:45,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:45,182 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 19:03:45,185 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 19:03:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:49,910 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 19:03:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383432503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:49,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:49,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435247383] [2021-08-21 19:03:49,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:49,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:49,911 INFO L87 Difference]: Start difference. First operand 24479 states and 64299 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:50,079 INFO L93 Difference]: Finished difference Result 26850 states and 69340 transitions. [2021-08-21 19:03:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:50,138 INFO L225 Difference]: With dead ends: 26850 [2021-08-21 19:03:50,138 INFO L226 Difference]: Without dead ends: 26841 [2021-08-21 19:03:50,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26841 states. [2021-08-21 19:03:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26841 to 24520. [2021-08-21 19:03:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24520 states, 24519 states have (on average 2.629348668379624) internal successors, (64469), 24519 states have internal predecessors, (64469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24520 states to 24520 states and 64469 transitions. [2021-08-21 19:03:50,544 INFO L78 Accepts]: Start accepts. Automaton has 24520 states and 64469 transitions. Word has length 35 [2021-08-21 19:03:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:50,544 INFO L470 AbstractCegarLoop]: Abstraction has 24520 states and 64469 transitions. [2021-08-21 19:03:50,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24520 states and 64469 transitions. [2021-08-21 19:03:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:50,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:50,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:50,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 19:03:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:50,785 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1757038932, now seen corresponding path program 2 times [2021-08-21 19:03:50,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:50,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176137866] [2021-08-21 19:03:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:50,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:50,850 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 19:03:50,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:50,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176137866] [2021-08-21 19:03:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176137866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:50,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786443300] [2021-08-21 19:03:50,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:50,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:50,852 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 19:03:50,852 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 19:03:55,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:03:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:55,659 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 19:03:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786443300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:55,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:55,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:03:55,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652057137] [2021-08-21 19:03:55,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:03:55,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:03:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:03:55,660 INFO L87 Difference]: Start difference. First operand 24520 states and 64469 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:55,815 INFO L93 Difference]: Finished difference Result 26978 states and 69657 transitions. [2021-08-21 19:03:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:03:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:55,876 INFO L225 Difference]: With dead ends: 26978 [2021-08-21 19:03:55,876 INFO L226 Difference]: Without dead ends: 26969 [2021-08-21 19:03:55,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:03:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26969 states. [2021-08-21 19:03:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26969 to 24570. [2021-08-21 19:03:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24570 states, 24569 states have (on average 2.6317310431845007) internal successors, (64659), 24569 states have internal predecessors, (64659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24570 states to 24570 states and 64659 transitions. [2021-08-21 19:03:56,259 INFO L78 Accepts]: Start accepts. Automaton has 24570 states and 64659 transitions. Word has length 35 [2021-08-21 19:03:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:56,259 INFO L470 AbstractCegarLoop]: Abstraction has 24570 states and 64659 transitions. [2021-08-21 19:03:56,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:03:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24570 states and 64659 transitions. [2021-08-21 19:03:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:03:56,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:56,298 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, 1, 1, 1] [2021-08-21 19:03:56,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-21 19:03:56,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:56,499 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:03:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2003628728, now seen corresponding path program 4 times [2021-08-21 19:03:56,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:56,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374009613] [2021-08-21 19:03:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:56,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:56,560 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 19:03:56,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:56,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374009613] [2021-08-21 19:03:56,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374009613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:56,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933079607] [2021-08-21 19:03:56,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:56,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:56,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:56,561 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 19:03:56,561 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 19:04:01,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:01,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:01,270 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 19:04:01,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933079607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:01,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:01,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:01,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675448741] [2021-08-21 19:04:01,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:01,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:01,271 INFO L87 Difference]: Start difference. First operand 24570 states and 64659 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:01,427 INFO L93 Difference]: Finished difference Result 26872 states and 69451 transitions. [2021-08-21 19:04:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:01,484 INFO L225 Difference]: With dead ends: 26872 [2021-08-21 19:04:01,484 INFO L226 Difference]: Without dead ends: 26863 [2021-08-21 19:04:01,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26863 states. [2021-08-21 19:04:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26863 to 24626. [2021-08-21 19:04:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24626 states, 24625 states have (on average 2.6333807106598983) internal successors, (64847), 24625 states have internal predecessors, (64847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24626 states to 24626 states and 64847 transitions. [2021-08-21 19:04:02,070 INFO L78 Accepts]: Start accepts. Automaton has 24626 states and 64847 transitions. Word has length 35 [2021-08-21 19:04:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:02,070 INFO L470 AbstractCegarLoop]: Abstraction has 24626 states and 64847 transitions. [2021-08-21 19:04:02,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 24626 states and 64847 transitions. [2021-08-21 19:04:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:02,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:02,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:02,141 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 19:04:02,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:02,313 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -646416116, now seen corresponding path program 4 times [2021-08-21 19:04:02,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:02,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756187290] [2021-08-21 19:04:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:02,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:02,371 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 19:04:02,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:02,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756187290] [2021-08-21 19:04:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756187290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:02,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676920344] [2021-08-21 19:04:02,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:02,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:02,372 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 19:04:02,373 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 19:04:06,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:07,094 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 19:04:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676920344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:07,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:07,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:07,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296809700] [2021-08-21 19:04:07,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:07,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:07,095 INFO L87 Difference]: Start difference. First operand 24626 states and 64847 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:07,278 INFO L93 Difference]: Finished difference Result 27071 states and 69740 transitions. [2021-08-21 19:04:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:07,336 INFO L225 Difference]: With dead ends: 27071 [2021-08-21 19:04:07,336 INFO L226 Difference]: Without dead ends: 27058 [2021-08-21 19:04:07,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27058 states. [2021-08-21 19:04:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27058 to 24679. [2021-08-21 19:04:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24679 states, 24678 states have (on average 2.6335197341761893) internal successors, (64990), 24678 states have internal predecessors, (64990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24679 states to 24679 states and 64990 transitions. [2021-08-21 19:04:07,750 INFO L78 Accepts]: Start accepts. Automaton has 24679 states and 64990 transitions. Word has length 35 [2021-08-21 19:04:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:07,750 INFO L470 AbstractCegarLoop]: Abstraction has 24679 states and 64990 transitions. [2021-08-21 19:04:07,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 24679 states and 64990 transitions. [2021-08-21 19:04:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:07,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:07,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:07,832 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 19:04:08,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:08,003 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash 810731532, now seen corresponding path program 4 times [2021-08-21 19:04:08,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:08,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115289220] [2021-08-21 19:04:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:08,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:08,065 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 19:04:08,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:08,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115289220] [2021-08-21 19:04:08,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115289220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:08,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192676272] [2021-08-21 19:04:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:08,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:08,066 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 19:04:08,066 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 19:04:12,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:12,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:12,924 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 19:04:12,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192676272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:12,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:12,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:12,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849823600] [2021-08-21 19:04:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:12,925 INFO L87 Difference]: Start difference. First operand 24679 states and 64990 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:13,090 INFO L93 Difference]: Finished difference Result 27222 states and 70417 transitions. [2021-08-21 19:04:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:13,151 INFO L225 Difference]: With dead ends: 27222 [2021-08-21 19:04:13,151 INFO L226 Difference]: Without dead ends: 27213 [2021-08-21 19:04:13,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:04:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27213 states. [2021-08-21 19:04:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27213 to 24745. [2021-08-21 19:04:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24745 states, 24744 states have (on average 2.636315874555448) internal successors, (65233), 24744 states have internal predecessors, (65233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24745 states to 24745 states and 65233 transitions. [2021-08-21 19:04:13,556 INFO L78 Accepts]: Start accepts. Automaton has 24745 states and 65233 transitions. Word has length 35 [2021-08-21 19:04:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:13,556 INFO L470 AbstractCegarLoop]: Abstraction has 24745 states and 65233 transitions. [2021-08-21 19:04:13,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24745 states and 65233 transitions. [2021-08-21 19:04:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:13,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:13,600 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:13,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-21 19:04:13,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:13,801 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash -404559300, now seen corresponding path program 5 times [2021-08-21 19:04:13,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:13,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401149361] [2021-08-21 19:04:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:13,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:13,860 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 19:04:13,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:13,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401149361] [2021-08-21 19:04:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401149361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:13,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80932690] [2021-08-21 19:04:13,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:04:13,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:13,861 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 19:04:13,862 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 19:04:18,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:18,708 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 19:04:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80932690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:18,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:18,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313805498] [2021-08-21 19:04:18,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:18,709 INFO L87 Difference]: Start difference. First operand 24745 states and 65233 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:18,865 INFO L93 Difference]: Finished difference Result 26801 states and 69553 transitions. [2021-08-21 19:04:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:18,921 INFO L225 Difference]: With dead ends: 26801 [2021-08-21 19:04:18,921 INFO L226 Difference]: Without dead ends: 26792 [2021-08-21 19:04:18,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-08-21 19:04:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 24800. [2021-08-21 19:04:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24800 states, 24799 states have (on average 2.637727327714827) internal successors, (65413), 24799 states have internal predecessors, (65413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24800 states to 24800 states and 65413 transitions. [2021-08-21 19:04:19,321 INFO L78 Accepts]: Start accepts. Automaton has 24800 states and 65413 transitions. Word has length 35 [2021-08-21 19:04:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:19,321 INFO L470 AbstractCegarLoop]: Abstraction has 24800 states and 65413 transitions. [2021-08-21 19:04:19,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 24800 states and 65413 transitions. [2021-08-21 19:04:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:19,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:19,366 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 19:04:19,398 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 19:04:19,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:19,577 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash -277372736, now seen corresponding path program 5 times [2021-08-21 19:04:19,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:19,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373542928] [2021-08-21 19:04:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:19,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:19,637 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 19:04:19,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:19,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373542928] [2021-08-21 19:04:19,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373542928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:19,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970308103] [2021-08-21 19:04:19,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:04:19,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:19,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:19,638 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 19:04:19,639 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 19:04:24,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:24,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:24,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:24,570 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 19:04:24,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970308103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:24,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:24,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:24,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792782406] [2021-08-21 19:04:24,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:24,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:24,571 INFO L87 Difference]: Start difference. First operand 24800 states and 65413 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:24,746 INFO L93 Difference]: Finished difference Result 26940 states and 69846 transitions. [2021-08-21 19:04:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:24,813 INFO L225 Difference]: With dead ends: 26940 [2021-08-21 19:04:24,813 INFO L226 Difference]: Without dead ends: 26931 [2021-08-21 19:04:24,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26931 states. [2021-08-21 19:04:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26931 to 24864. [2021-08-21 19:04:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24864 states, 24863 states have (on average 2.638096770301251) internal successors, (65591), 24863 states have internal predecessors, (65591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24864 states to 24864 states and 65591 transitions. [2021-08-21 19:04:25,233 INFO L78 Accepts]: Start accepts. Automaton has 24864 states and 65591 transitions. Word has length 35 [2021-08-21 19:04:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:25,233 INFO L470 AbstractCegarLoop]: Abstraction has 24864 states and 65591 transitions. [2021-08-21 19:04:25,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24864 states and 65591 transitions. [2021-08-21 19:04:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:25,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:25,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:25,312 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 19:04:25,479 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,SelfDestructingSolverStorable288 [2021-08-21 19:04:25,479 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash 949149496, now seen corresponding path program 6 times [2021-08-21 19:04:25,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:25,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250657941] [2021-08-21 19:04:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:25,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:25,673 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 19:04:25,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:25,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250657941] [2021-08-21 19:04:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250657941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:25,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839147014] [2021-08-21 19:04:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:25,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:25,674 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 19:04:25,675 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 19:04:30,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:30,537 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 19:04:30,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839147014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:30,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708099720] [2021-08-21 19:04:30,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:30,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:30,538 INFO L87 Difference]: Start difference. First operand 24864 states and 65591 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:30,695 INFO L93 Difference]: Finished difference Result 26836 states and 69685 transitions. [2021-08-21 19:04:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:30,750 INFO L225 Difference]: With dead ends: 26836 [2021-08-21 19:04:30,750 INFO L226 Difference]: Without dead ends: 26827 [2021-08-21 19:04:30,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-08-21 19:04:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 24899. [2021-08-21 19:04:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24899 states, 24898 states have (on average 2.639408787854446) internal successors, (65716), 24898 states have internal predecessors, (65716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24899 states to 24899 states and 65716 transitions. [2021-08-21 19:04:31,157 INFO L78 Accepts]: Start accepts. Automaton has 24899 states and 65716 transitions. Word has length 35 [2021-08-21 19:04:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 24899 states and 65716 transitions. [2021-08-21 19:04:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 24899 states and 65716 transitions. [2021-08-21 19:04:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:31,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:31,199 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, 1, 1, 1] [2021-08-21 19:04:31,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-21 19:04:31,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 19:04:31,400 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash 596965684, now seen corresponding path program 6 times [2021-08-21 19:04:31,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:31,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439999275] [2021-08-21 19:04:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:31,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:31,460 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 19:04:31,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:31,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439999275] [2021-08-21 19:04:31,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439999275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480238210] [2021-08-21 19:04:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:31,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:31,461 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 19:04:31,462 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 19:04:36,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:04:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:36,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:36,413 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 19:04:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480238210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:36,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:36,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459763394] [2021-08-21 19:04:36,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:36,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:36,414 INFO L87 Difference]: Start difference. First operand 24899 states and 65716 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:36,572 INFO L93 Difference]: Finished difference Result 26923 states and 69893 transitions. [2021-08-21 19:04:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:36,628 INFO L225 Difference]: With dead ends: 26923 [2021-08-21 19:04:36,628 INFO L226 Difference]: Without dead ends: 26914 [2021-08-21 19:04:36,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-08-21 19:04:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 24941. [2021-08-21 19:04:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24941 states, 24940 states have (on average 2.6403769045709704) internal successors, (65851), 24940 states have internal predecessors, (65851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24941 states to 24941 states and 65851 transitions. [2021-08-21 19:04:37,170 INFO L78 Accepts]: Start accepts. Automaton has 24941 states and 65851 transitions. Word has length 35 [2021-08-21 19:04:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:37,170 INFO L470 AbstractCegarLoop]: Abstraction has 24941 states and 65851 transitions. [2021-08-21 19:04:37,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24941 states and 65851 transitions. [2021-08-21 19:04:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:37,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:37,213 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 19:04:37,243 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 19:04:37,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:37,414 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1437565516, now seen corresponding path program 3 times [2021-08-21 19:04:37,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:37,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821388003] [2021-08-21 19:04:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:37,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:37,473 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 19:04:37,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:37,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821388003] [2021-08-21 19:04:37,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821388003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:37,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075270255] [2021-08-21 19:04:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:04:37,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:37,474 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 19:04:37,475 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 19:04:42,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:04:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:42,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:42,367 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 19:04:42,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075270255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:42,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:42,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:42,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755615783] [2021-08-21 19:04:42,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:42,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:42,368 INFO L87 Difference]: Start difference. First operand 24941 states and 65851 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:42,526 INFO L93 Difference]: Finished difference Result 27122 states and 70345 transitions. [2021-08-21 19:04:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:42,583 INFO L225 Difference]: With dead ends: 27122 [2021-08-21 19:04:42,583 INFO L226 Difference]: Without dead ends: 27113 [2021-08-21 19:04:42,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27113 states. [2021-08-21 19:04:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27113 to 24987. [2021-08-21 19:04:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24987 states, 24986 states have (on average 2.6410790042423757) internal successors, (65990), 24986 states have internal predecessors, (65990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24987 states to 24987 states and 65990 transitions. [2021-08-21 19:04:43,004 INFO L78 Accepts]: Start accepts. Automaton has 24987 states and 65990 transitions. Word has length 35 [2021-08-21 19:04:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:43,004 INFO L470 AbstractCegarLoop]: Abstraction has 24987 states and 65990 transitions. [2021-08-21 19:04:43,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24987 states and 65990 transitions. [2021-08-21 19:04:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:43,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:43,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:43,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-21 19:04:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-08-21 19:04:43,247 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash 207356936, now seen corresponding path program 3 times [2021-08-21 19:04:43,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:43,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45641894] [2021-08-21 19:04:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:43,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:43,308 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 19:04:43,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:43,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45641894] [2021-08-21 19:04:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45641894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:43,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166482693] [2021-08-21 19:04:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:04:43,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:43,309 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 19:04:43,310 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 19:04:48,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:04:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:48,217 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 19:04:48,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166482693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:48,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:48,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:48,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757912508] [2021-08-21 19:04:48,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:48,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:48,218 INFO L87 Difference]: Start difference. First operand 24987 states and 65990 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:48,457 INFO L93 Difference]: Finished difference Result 27323 states and 70637 transitions. [2021-08-21 19:04:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:48,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:48,513 INFO L225 Difference]: With dead ends: 27323 [2021-08-21 19:04:48,513 INFO L226 Difference]: Without dead ends: 27310 [2021-08-21 19:04:48,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27310 states. [2021-08-21 19:04:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27310 to 25031. [2021-08-21 19:04:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 2.640870954854175) internal successors, (66101), 25030 states have internal predecessors, (66101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 66101 transitions. [2021-08-21 19:04:48,911 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 66101 transitions. Word has length 35 [2021-08-21 19:04:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 25031 states and 66101 transitions. [2021-08-21 19:04:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 66101 transitions. [2021-08-21 19:04:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:48,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:48,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:48,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-21 19:04:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:49,154 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1664504584, now seen corresponding path program 3 times [2021-08-21 19:04:49,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:49,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76461773] [2021-08-21 19:04:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:49,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:49,215 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 19:04:49,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:49,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76461773] [2021-08-21 19:04:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76461773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:49,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106752343] [2021-08-21 19:04:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:04:49,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:49,216 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 19:04:49,216 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 19:04:54,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:04:54,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:54,166 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 19:04:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106752343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:54,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:54,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:54,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186672482] [2021-08-21 19:04:54,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:54,167 INFO L87 Difference]: Start difference. First operand 25031 states and 66101 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:54,332 INFO L93 Difference]: Finished difference Result 27455 states and 71214 transitions. [2021-08-21 19:04:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:54,400 INFO L225 Difference]: With dead ends: 27455 [2021-08-21 19:04:54,400 INFO L226 Difference]: Without dead ends: 27446 [2021-08-21 19:04:54,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:04:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27446 states. [2021-08-21 19:04:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27446 to 25075. [2021-08-21 19:04:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25075 states, 25074 states have (on average 2.642857142857143) internal successors, (66267), 25074 states have internal predecessors, (66267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25075 states to 25075 states and 66267 transitions. [2021-08-21 19:04:54,848 INFO L78 Accepts]: Start accepts. Automaton has 25075 states and 66267 transitions. Word has length 35 [2021-08-21 19:04:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:54,848 INFO L470 AbstractCegarLoop]: Abstraction has 25075 states and 66267 transitions. [2021-08-21 19:04:54,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:04:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 25075 states and 66267 transitions. [2021-08-21 19:04:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:04:54,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:54,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:54,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-21 19:04:55,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:55,096 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash 576400316, now seen corresponding path program 4 times [2021-08-21 19:04:55,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:55,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508468492] [2021-08-21 19:04:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:55,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:55,158 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 19:04:55,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:55,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508468492] [2021-08-21 19:04:55,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508468492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:55,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884367275] [2021-08-21 19:04:55,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:55,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:55,159 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 19:04:55,159 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 19:04:59,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:00,146 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 19:05:00,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884367275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:00,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:00,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:00,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237939334] [2021-08-21 19:05:00,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:00,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:00,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:00,147 INFO L87 Difference]: Start difference. First operand 25075 states and 66267 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:00,325 INFO L93 Difference]: Finished difference Result 27102 states and 70409 transitions. [2021-08-21 19:05:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:00,390 INFO L225 Difference]: With dead ends: 27102 [2021-08-21 19:05:00,391 INFO L226 Difference]: Without dead ends: 27093 [2021-08-21 19:05:00,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 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 19:05:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27093 states. [2021-08-21 19:05:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27093 to 25120. [2021-08-21 19:05:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.6427007444563877) internal successors, (66382), 25119 states have internal predecessors, (66382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 66382 transitions. [2021-08-21 19:05:00,818 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 66382 transitions. Word has length 35 [2021-08-21 19:05:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:00,818 INFO L470 AbstractCegarLoop]: Abstraction has 25120 states and 66382 transitions. [2021-08-21 19:05:00,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 66382 transitions. [2021-08-21 19:05:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:00,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:00,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:01,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-21 19:05:01,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:01,192 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1930109112, now seen corresponding path program 5 times [2021-08-21 19:05:01,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:01,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847730767] [2021-08-21 19:05:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:01,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:01,253 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 19:05:01,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:01,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847730767] [2021-08-21 19:05:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847730767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:01,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043034271] [2021-08-21 19:05:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:05:01,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:01,254 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 19:05:01,254 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 19:05:06,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:05:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:06,461 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 19:05:06,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043034271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:06,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:06,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:06,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357855443] [2021-08-21 19:05:06,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:06,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:06,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:06,462 INFO L87 Difference]: Start difference. First operand 25120 states and 66382 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:06,633 INFO L93 Difference]: Finished difference Result 26966 states and 70143 transitions. [2021-08-21 19:05:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:06,703 INFO L225 Difference]: With dead ends: 26966 [2021-08-21 19:05:06,703 INFO L226 Difference]: Without dead ends: 26957 [2021-08-21 19:05:06,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26957 states. [2021-08-21 19:05:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26957 to 25155. [2021-08-21 19:05:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25155 states, 25154 states have (on average 2.6431979009302697) internal successors, (66487), 25154 states have internal predecessors, (66487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25155 states to 25155 states and 66487 transitions. [2021-08-21 19:05:07,139 INFO L78 Accepts]: Start accepts. Automaton has 25155 states and 66487 transitions. Word has length 35 [2021-08-21 19:05:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:07,139 INFO L470 AbstractCegarLoop]: Abstraction has 25155 states and 66487 transitions. [2021-08-21 19:05:07,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 25155 states and 66487 transitions. [2021-08-21 19:05:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:07,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:07,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:07,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-21 19:05:07,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:07,387 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -583792464, now seen corresponding path program 6 times [2021-08-21 19:05:07,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:07,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011054873] [2021-08-21 19:05:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:07,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:07,451 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 19:05:07,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:07,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011054873] [2021-08-21 19:05:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011054873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:07,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284945639] [2021-08-21 19:05:07,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:05:07,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:07,452 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 19:05:07,453 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 19:05:12,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:05:12,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:12,563 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 19:05:12,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284945639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:12,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:12,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:12,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769377429] [2021-08-21 19:05:12,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:12,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:12,564 INFO L87 Difference]: Start difference. First operand 25155 states and 66487 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:12,738 INFO L93 Difference]: Finished difference Result 27447 states and 71133 transitions. [2021-08-21 19:05:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:12,810 INFO L225 Difference]: With dead ends: 27447 [2021-08-21 19:05:12,810 INFO L226 Difference]: Without dead ends: 27438 [2021-08-21 19:05:12,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:05:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27438 states. [2021-08-21 19:05:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27438 to 25201. [2021-08-21 19:05:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 2.6434920634920633) internal successors, (66616), 25200 states have internal predecessors, (66616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 66616 transitions. [2021-08-21 19:05:13,262 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 66616 transitions. Word has length 35 [2021-08-21 19:05:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 25201 states and 66616 transitions. [2021-08-21 19:05:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 66616 transitions. [2021-08-21 19:05:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:13,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:13,307 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 19:05:13,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-21 19:05:13,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:13,508 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1061129988, now seen corresponding path program 3 times [2021-08-21 19:05:13,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:13,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683967324] [2021-08-21 19:05:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:13,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:13,568 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 19:05:13,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:13,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683967324] [2021-08-21 19:05:13,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683967324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:13,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94328390] [2021-08-21 19:05:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:05:13,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:13,569 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 19:05:13,569 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 19:05:18,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:05:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:18,865 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 19:05:18,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94328390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:18,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:18,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:18,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121697879] [2021-08-21 19:05:18,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:18,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:18,866 INFO L87 Difference]: Start difference. First operand 25201 states and 66616 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:19,028 INFO L93 Difference]: Finished difference Result 27650 states and 71400 transitions. [2021-08-21 19:05:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:19,093 INFO L225 Difference]: With dead ends: 27650 [2021-08-21 19:05:19,093 INFO L226 Difference]: Without dead ends: 27637 [2021-08-21 19:05:19,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:05:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27637 states. [2021-08-21 19:05:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27637 to 25254. [2021-08-21 19:05:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25254 states, 25253 states have (on average 2.6427355165722886) internal successors, (66737), 25253 states have internal predecessors, (66737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25254 states to 25254 states and 66737 transitions. [2021-08-21 19:05:19,514 INFO L78 Accepts]: Start accepts. Automaton has 25254 states and 66737 transitions. Word has length 35 [2021-08-21 19:05:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:19,514 INFO L470 AbstractCegarLoop]: Abstraction has 25254 states and 66737 transitions. [2021-08-21 19:05:19,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 25254 states and 66737 transitions. [2021-08-21 19:05:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:19,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:19,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:19,592 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 19:05:19,761 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,SelfDestructingSolverStorable297 [2021-08-21 19:05:19,761 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1776689660, now seen corresponding path program 3 times [2021-08-21 19:05:19,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:19,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732969491] [2021-08-21 19:05:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:19,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:19,830 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 19:05:19,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:19,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732969491] [2021-08-21 19:05:19,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732969491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:19,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538967138] [2021-08-21 19:05:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:05:19,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:19,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:19,831 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 19:05:19,832 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 19:05:25,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:05:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:25,201 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 19:05:25,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538967138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:25,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:25,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:25,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674563871] [2021-08-21 19:05:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:25,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:25,202 INFO L87 Difference]: Start difference. First operand 25254 states and 66737 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:25,376 INFO L93 Difference]: Finished difference Result 27792 states and 72027 transitions. [2021-08-21 19:05:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:25,444 INFO L225 Difference]: With dead ends: 27792 [2021-08-21 19:05:25,445 INFO L226 Difference]: Without dead ends: 27783 [2021-08-21 19:05:25,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:05:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27783 states. [2021-08-21 19:05:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27783 to 25306. [2021-08-21 19:05:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25306 states, 25305 states have (on average 2.6439834024896265) internal successors, (66906), 25305 states have internal predecessors, (66906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25306 states to 25306 states and 66906 transitions. [2021-08-21 19:05:25,923 INFO L78 Accepts]: Start accepts. Automaton has 25306 states and 66906 transitions. Word has length 35 [2021-08-21 19:05:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:25,923 INFO L470 AbstractCegarLoop]: Abstraction has 25306 states and 66906 transitions. [2021-08-21 19:05:25,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 25306 states and 66906 transitions. [2021-08-21 19:05:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:25,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:25,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:26,012 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 19:05:26,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-08-21 19:05:26,201 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash 442502572, now seen corresponding path program 4 times [2021-08-21 19:05:26,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:26,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19573344] [2021-08-21 19:05:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:26,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:26,268 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 19:05:26,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:26,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19573344] [2021-08-21 19:05:26,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19573344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:26,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377293839] [2021-08-21 19:05:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:05:26,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:26,270 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 19:05:26,278 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 19:05:31,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:05:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:31,552 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 19:05:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377293839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:31,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069823188] [2021-08-21 19:05:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:31,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:31,553 INFO L87 Difference]: Start difference. First operand 25306 states and 66906 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:31,744 INFO L93 Difference]: Finished difference Result 27467 states and 71466 transitions. [2021-08-21 19:05:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:31,818 INFO L225 Difference]: With dead ends: 27467 [2021-08-21 19:05:31,818 INFO L226 Difference]: Without dead ends: 27458 [2021-08-21 19:05:31,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:05:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27458 states. [2021-08-21 19:05:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27458 to 25320. [2021-08-21 19:05:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25320 states, 25319 states have (on average 2.6453256447727003) internal successors, (66977), 25319 states have internal predecessors, (66977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25320 states to 25320 states and 66977 transitions. [2021-08-21 19:05:32,276 INFO L78 Accepts]: Start accepts. Automaton has 25320 states and 66977 transitions. Word has length 35 [2021-08-21 19:05:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:32,277 INFO L470 AbstractCegarLoop]: Abstraction has 25320 states and 66977 transitions. [2021-08-21 19:05:32,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 25320 states and 66977 transitions. [2021-08-21 19:05:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:32,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:32,326 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, 1, 1, 1] [2021-08-21 19:05:32,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-21 19:05:32,536 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,SelfDestructingSolverStorable299 [2021-08-21 19:05:32,537 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2087425024, now seen corresponding path program 4 times [2021-08-21 19:05:32,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:32,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469753566] [2021-08-21 19:05:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:32,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:32,601 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 19:05:32,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:32,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469753566] [2021-08-21 19:05:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469753566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:32,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461134747] [2021-08-21 19:05:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:05:32,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:32,602 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 19:05:32,602 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 19:05:37,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:05:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:05:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:37,971 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 19:05:37,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461134747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:37,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:37,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:05:37,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977175634] [2021-08-21 19:05:37,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:05:37,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:05:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:05:37,972 INFO L87 Difference]: Start difference. First operand 25320 states and 66977 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:38,151 INFO L93 Difference]: Finished difference Result 27617 states and 71612 transitions. [2021-08-21 19:05:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:05:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:38,211 INFO L225 Difference]: With dead ends: 27617 [2021-08-21 19:05:38,212 INFO L226 Difference]: Without dead ends: 27604 [2021-08-21 19:05:38,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 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 19:05:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27604 states. [2021-08-21 19:05:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27604 to 25336. [2021-08-21 19:05:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 2.6460232879415826) internal successors, (67037), 25335 states have internal predecessors, (67037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 67037 transitions. [2021-08-21 19:05:38,652 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 67037 transitions. Word has length 35 [2021-08-21 19:05:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:38,652 INFO L470 AbstractCegarLoop]: Abstraction has 25336 states and 67037 transitions. [2021-08-21 19:05:38,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 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 19:05:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 67037 transitions. [2021-08-21 19:05:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 19:05:38,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:38,710 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, 1, 1, 1] [2021-08-21 19:05:38,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-08-21 19:05:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-21 19:05:38,937 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:05:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -750394624, now seen corresponding path program 4 times [2021-08-21 19:05:38,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:38,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823214998] [2021-08-21 19:05:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:38,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:38,998 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 19:05:38,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:38,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823214998] [2021-08-21 19:05:38,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823214998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:38,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500944091] [2021-08-21 19:05:38,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:05:38,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:38,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:38,999 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 19:05:39,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 19:05:41,274 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:05:41,274 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 19:05:42,291 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:05:42,298 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 19:05:42,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 19:05:42,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-08-21 19:05:42,492 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 36 with TraceHistMax 1,while executing Executor. [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 19:05:42,494 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 19:05:42,497 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:05:42,497 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:05:42,498 INFO L202 PluginConnector]: Adding new model add-sub08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:05:42 BasicIcfg [2021-08-21 19:05:42,498 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:05:42,500 INFO L168 Benchmark]: Toolchain (without parser) took 769991.61 ms. Allocated memory was 179.3 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 159.4 MB in the beginning and 4.0 GB in the end (delta: -3.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. [2021-08-21 19:05:42,500 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 179.3 MB. Free memory was 160.5 MB in the beginning and 160.4 MB in the end (delta: 87.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:05:42,500 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.25 ms. Allocated memory is still 179.3 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:05:42,501 INFO L168 Benchmark]: Boogie Preprocessor took 12.72 ms. Allocated memory is still 179.3 MB. Free memory was 157.9 MB in the beginning and 157.0 MB in the end (delta: 890.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 19:05:42,503 INFO L168 Benchmark]: RCFGBuilder took 151.74 ms. Allocated memory is still 179.3 MB. Free memory was 156.9 MB in the beginning and 147.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 19:05:42,503 INFO L168 Benchmark]: TraceAbstraction took 769803.09 ms. Allocated memory was 179.3 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 146.6 MB in the beginning and 4.0 GB in the end (delta: -3.8 GB). Peak memory consumption was 2.4 GB. Max. memory is 8.0 GB. [2021-08-21 19:05:42,503 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 0.12 ms. Allocated memory is still 179.3 MB. Free memory was 160.5 MB in the beginning and 160.4 MB in the end (delta: 87.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.25 ms. Allocated memory is still 179.3 MB. Free memory was 159.3 MB in the beginning and 157.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.72 ms. Allocated memory is still 179.3 MB. Free memory was 157.9 MB in the beginning and 157.0 MB in the end (delta: 890.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 151.74 ms. Allocated memory is still 179.3 MB. Free memory was 156.9 MB in the beginning and 147.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 769803.09 ms. Allocated memory was 179.3 MB in the beginning and 5.8 GB in the end (delta: 5.6 GB). Free memory was 146.6 MB in the beginning and 4.0 GB in the end (delta: -3.8 GB). Peak memory consumption was 2.4 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: 941780, positive: 912656, positive conditional: 912656, positive unconditional: 0, negative: 29124, negative conditional: 29124, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 912656, positive: 912656, positive conditional: 0, positive unconditional: 912656, 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: 672, positive: 672, positive conditional: 0, positive unconditional: 672, 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: 672, positive: 560, positive conditional: 0, positive unconditional: 560, negative: 112, negative conditional: 0, negative unconditional: 112, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 112, positive: 112, positive conditional: 0, positive unconditional: 112, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 232, positive: 232, positive conditional: 0, positive unconditional: 232, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 912656, positive: 911984, positive conditional: 0, positive unconditional: 911984, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 672, unknown conditional: 0, unknown unconditional: 672] , Statistics on independence cache: Total cache size (in pairs): 672, Positive cache size: 672, Positive conditional cache size: 0, Positive unconditional cache size: 672, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 29124 - 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: 26]: 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: 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: 15]: 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. - 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: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 65 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 769677.2ms, OverallIterations: 302, TraceHistogramMax: 2, EmptinessCheckTime: 9113.9ms, AutomataDifference: 52338.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4955.7ms, PartialOrderReductionTime: 4930.0ms, HoareTripleCheckerStatistics: 15256 SDtfs, 4616 SDslu, 41180 SDs, 0 SdLazy, 41281 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15313.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8979 GetRequests, 7341 SyntacticMatches, 509 SemanticMatches, 1129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5955.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=109228occurred in iteration=0, InterpolantAutomatonStates: 1731, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 82879.3ms AutomataMinimizationTime, 301 MinimizatonAttempts, 593010 StatesRemovedByMinimization, 301 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1674.9ms SsaConstructionTime, 4501.5ms SatisfiabilityAnalysisTime, 49498.7ms InterpolantComputationTime, 17541 NumberOfCodeBlocks, 17541 NumberOfCodeBlocksAsserted, 710 NumberOfCheckSat, 17031 ConstructedInterpolants, 0 QuantifiedInterpolants, 121257 SizeOfPredicates, 0 NumberOfNonLiveVariables, 35808 ConjunctsInSsa, 3023 ConjunctsInUnsatCore, 510 InterpolantComputations, 92 PerfectInterpolantSequences, 957/1529 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